Entegris (ENTG) 10-K26 Feb 152014 FY Annual reportFinancial data

Company Profile

Document_and_Entity_Informatio

Document and Entity Information (USD $)	12 Months Ended
Document and Entity Information (USD $)	Dec. 31, 2014	Feb. 18, 2015	Jun. 28, 2014
Document Information [Line Items]
Document Type	10-K
Amendment Flag	FALSE
Document Period End Date	31-Dec-14
Document Fiscal Year Focus	2014
Document Fiscal Period Focus	FY
Trading Symbol	ENTG
Entity Registrant Name	ENTEGRIS INC
Entity Central Index Key	1101302
Current Fiscal Year End Date	-19
Entity Well-known Seasoned Issuer	Yes
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		139,792,583
Entity Public Float			$1,683,447,163

Consolidated_Balance_Sheets

Consolidated Balance Sheets (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Current assets:
Cash and cash equivalents	$389,699	$384,426
Short-term investments	4,601	0
Trade accounts and notes receivable, net	153,961	101,873
Inventories, net	163,125	94,074
Deferred tax assets, deferred tax charges and refundable income taxes	30,556	20,844
Other current assets	23,713	11,088
Total current assets	765,655	612,305
Property, plant and equipment, net	313,569	186,440
Other assets:
Goodwill	340,743	12,274
Intangible assets, net	308,554	43,509
Deferred tax assets and other noncurrent tax assets	5,068	12,039
Other	28,502	8,727
Total assets	1,762,091	875,294
Current liabilities:
Long-term debt, current maturities	100,000	0
Accounts payable	57,417	38,396
Accrued payroll and related benefits	51,164	30,116
Other accrued liabilities	40,387	18,700
Deferred tax liabilities and income taxes payable	13,552	10,373
Total current liabilities	262,520	97,585
Long-term debt, excluding current maturities	666,796	0
Pension benefit obligations and other liabilities	25,373	15,411
Deferred tax liabilities and other noncurrent tax liabilities	58,961	5,455
Commitments and contingent liabilities	0	0
Equity:
Preferred stock, par value $.01; 5,000,000 shares authorized; none issued and outstanding as of December 31, 2014 and 2013	0	0
Common stock, par value $.01; 400,000,000 shares authorized; issued and outstanding shares: 139,792,583 and 138,734,442	1,398	1,387
Additional paid-in capital	830,430	819,632
Retained deficit	-80,712	-88,599
Accumulated other comprehensive income	-2,675	24,423
Total equity	748,441	756,843
Total liabilities and equity	$1,762,091	$875,294

Consolidated_Balance_Sheets_Pa

Consolidated Balance Sheets (Parenthetical) (USD $)	Dec. 31, 2014	Dec. 31, 2013
Preferred stock, par value	$0.01	$0.01
Preferred stock, shares authorized	5,000,000	5,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value	$0.01	$0.01
Common stock, shares authorized	400,000,000	400,000,000
Common stock, shares issued	139,792,583	138,734,442
Common stock, shares outstanding	139,792,583	138,734,442

Consolidated_Statements_Of_Ope

Consolidated Statements Of Operations (USD $)	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Net sales	$962,069	$693,459	$715,903
Cost of sales	585,386	399,245	408,520
Gross profit	376,683	294,214	307,383
Selling, general and administrative expenses	231,833	137,123	147,405
Engineering, research and development expenses	87,711	55,320	50,940
Amortization of intangible assets	37,067	9,347	9,594
Contingent consideration fair value adjustment	-1,282	-1,813	0
Operating income	21,354	94,237	99,444
Interest expense	33,355	153	271
Interest income	-1,336	-317	-281
Other expense (income), net	2,727	-1,794	-249
(Loss) income before income tax (benefit) expense and equity in net loss (income) of affiliates	-13,392	96,195	99,703
Income tax (benefit) expense	-21,572	21,669	30,881
Equity in net loss (income) of affiliates	293	0	-3
Net income	$7,887	$74,526	$68,825
Earnings Per Share:
Basic net income per common share	$0.06	$0.54	$0.50
Diluted net income per common share	$0.06	$0.53	$0.50
Weighted shares outstanding
Basic	139,311	138,950	137,306
Diluted	140,062	139,618	138,412

Consolidated_Statements_Of_Com

Consolidated Statements Of Comprehensive Income (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Net income	$7,887	$74,526	$68,825
Other comprehensive loss, net of tax
Foreign currency translation adjustments	-26,948	-17,504	-2,524
Reclassification of cumulative translation adjustment associated with liquidated subsidiaries	0	787	0
Reclassification of cumulative translation adjustment associated with acquisition of business	0	0	-216
Unrealized loss on available-for-sale investments	-1,884	0	0
Reclassification adjustment associated with unrealized loss realized upon the write-down of available-for-sale investments	1,884	0	0
Pension liability adjustments, net of income tax expense (benefit) of $71,$(37), and $74 for year ended December 31, 2014, 2013, and 2012	-150	202	-295
Other comprehensive loss	-27,098	-16,515	-3,035
Comprehensive (loss) income	($19,211)	$58,011	$65,790

Consolidated_Statements_Of_Com1

Consolidated Statements Of Comprehensive Income (Parenthetical) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2011
Pension liability adjustments, income tax expense (benefit)	$71	($37)	$74

Consolidated_Statements_Of_Equ

Consolidated Statements Of Equity (USD $)	Total	Common stock	Additional paid-in capital	Retained deficit	Foreign currency translation adjustments	Defined benefit pension adjustments
In Thousands	Total	Common stock	Additional paid-in capital	Retained deficit	Foreign currency translation adjustments	Defined benefit pension adjustments
Balance at Dec. 31, 2011	$608,238	$1,358	$788,673	($225,766)	$44,737	($764)
Balance (in shares) at Dec. 31, 2011		135,821
Shares issued under stock plans (in shares)		2,694
Shares issued under stock plans	7,431	28	7,403	0	0	0
Share-based compensation expense	9,881	0	9,881	0	0	0
Repurchase and retirement of common stock (in shares)		-57
Repurchase and retirement of common stock	-427	-1	-329	-97	0	0
Tax benefit associated with stock plans	3,886	0	3,886	0	0	0
Pension liability adjustment	-295	0	0	0	0	-295
Reclassification of cumulative translation adjustment associated with acquisition of business	-216	0	0	0	-216	0
Foreign currency translation	-2,524	0	0	0	-2,524	0
Net income	68,825	0	0	68,825	0	0
Balance at Dec. 31, 2012	694,799	1,385	809,514	-157,038	41,997	-1,059
Balance (in shares) at Dec. 31, 2012		138,458
Shares issued under stock plans (in shares)		1,882
Shares issued under stock plans	7,685	18	7,667	0	0	0
Share-based compensation expense	7,928	0	7,928	0	0	0
Repurchase and retirement of common stock (in shares)		-1,606
Repurchase and retirement of common stock	-15,494	-16	-9,391	-6,087	0	0
Tax benefit associated with stock plans	3,914	0	3,914	0	0	0
Pension liability adjustment	202	0	0	0	0	202
Reclassification of cumulative translation adjustment associated with liquidated subsidiaries	787	0	0	0	787	0
Reclassification of cumulative translation adjustment associated with acquisition of business	0
Foreign currency translation	-17,504	0	0	0	-17,504	0
Net income	74,526	0	0	74,526	0	0
Balance at Dec. 31, 2013	756,843	1,387	819,632	-88,599	25,280	-857
Balance (in shares) at Dec. 31, 2013		138,734
Shares issued under stock plans (in shares)		1,059
Shares issued under stock plans	1,080	11	1,069	0	0	0
Share-based compensation expense	8,887	0	8,887	0	0	0
Tax benefit associated with stock plans	842	0	842	0	0	0
Pension liability adjustment	-150	0	0	0	0	-150
Reclassification of cumulative translation adjustment associated with acquisition of business	0
Foreign currency translation	-26,948	0	0	0	-26,948	0
Net income	7,887	0	0	7,887	0	0
Balance at Dec. 31, 2014	$748,441	$1,398	$830,430	($80,712)	($1,668)	($1,007)
Balance (in shares) at Dec. 31, 2014		139,793

Consolidated_Statements_Of_Cas

Consolidated Statements Of Cash Flows (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Operating activities:
Net income	$7,887	$74,526	$68,825
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	46,637	29,468	28,013
Amortization	37,067	9,347	9,594
Share-based compensation expense	8,887	7,928	9,881
Charge for fair value write-up of acquired inventory sold	48,586	0	0
Provision for deferred income taxes	-44,716	8,232	11,940
Charge for excess and obsolete inventory	4,513	3,963	4,007
Excess tax benefit from share-based compensation plans	-842	-3,914	-3,805
Amortization of debt issuance costs	5,848	0	0
Other	2,209	-765	1,701
Changes in operating assets and liabilities, net of effects of acquisitions:
Trade accounts receivable and notes receivable	-4,845	-13,363	10,626
Inventories	-11,608	-441	-6,118
Accounts payable and other accrued liabilities	14,348	-4,408	6,265
Other current assets	-1,699	-414	-2,985
Income taxes payable and refundable income taxes	10,975	2,731	-11,015
Other	3,176	-3,488	-11,767
Net cash provided by operating activities	126,423	109,402	115,162
Investing activities:
Acquisition of property and equipment	-57,733	-60,360	-49,929
Acquisition of business, net of cash acquired	-809,390	-13,358	-2,961
Purchase of short-term investments	0	0	-27,990
Proceeds from sale or maturities of short-term investments	13,778	20,000	8,000
Proceeds from sale of assets held for sale	0	6,500	0
Payments for non-compete agreements	-7,517	0	0
Other	567	189	413
Net cash used in investing activities	-860,295	-47,029	-72,467
Financing activities:
Proceeds from long-term debt	855,200	0	0
Payments of long-term debt	-88,650	0	0
Payments for debt issuance costs	-20,747	0	0
Issuance of common stock from employee stock plans	3,559	7,685	7,431
Taxes paid related to net share settlement of equity awards	-2,479	0	0
Repurchase and retirement of common stock	0	-15,494	-427
Other	765	3,914	3,886
Net cash provided by (used in) financing activities	747,648	-3,895	10,890
Effect of exchange rate changes on cash and cash equivalents	-8,503	-4,471	3,241
Increase in cash and cash equivalents	5,273	54,007	56,826
Cash and cash equivalents at beginning of year	384,426	330,419	273,593
Cash and cash equivalents at end of year	389,699	384,426	330,419
Supplemental Cash Flow Information
Equipment purchases in accounts payable	3,702	6,950	3,429
Schedule of interest and income taxes paid:
Interest paid	21,919	72	271
Income taxes, net of refunds received	$12,274	$10,208	$29,697

Summary_of_Significant_Account

Summary of Significant Accounting Policies	12 Months Ended
Summary of Significant Accounting Policies	Dec. 31, 2014
Summary of Significant Accounting Policies	SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
	Nature of Operations Entegris, Inc. (Entegris or the Company) is a leading provider of yield-enhancing materials and solutions for advanced manufacturing processes in the semiconductor and other high-technology industries.
	Principles of Consolidation The consolidated financial statements include the accounts of the Company and its majority-owned subsidiaries. Intercompany profits, transactions and balances have been eliminated in consolidation.
	Use of Estimates and Basis of Presentation The preparation of consolidated financial statements in conformity with accounting principles generally accepted in the United States requires management to make judgments, estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. On an ongoing basis, Entegris evaluates its estimates, including those related to receivables, inventories, property, plant and equipment, intangible assets, accrued liabilities, income taxes and share-based compensation, among others. Actual results could differ from those estimates.
	Concentrations of Suppliers Certain materials included in the Company’s products are obtained from a single source or a limited group of suppliers. Although the Company seeks to reduce dependence on those sole and limited source suppliers, the partial or complete loss of these sources could have at least a temporary adverse effect on the Company’s results of operations. Furthermore, a significant increase in the price of one or more of these components could adversely affect the Company’s results of operations.
	Cash and Cash Equivalents Cash and cash equivalents include cash on hand and highly liquid debt securities with original maturities of three months or less, which are valued at cost and approximates fair value.
	Allowance for Doubtful Accounts An allowance for uncollectible trade receivables is estimated based on a combination of write-off history, aging analysis and any specific, known troubled accounts. The Company maintains an allowance for doubtful accounts that management believes is adequate to cover expected losses on trade receivables.
	Inventories Inventories are stated at the lower of cost or market. Cost is determined by the first-in, first-out (FIFO) method.
	Property, Plant, and Equipment Property, plant and equipment are carried at cost and are depreciated on the straight-line method over the estimated useful lives of the assets. When assets are retired or disposed of, the cost and related accumulated depreciation are removed from the accounts, and gains or losses are recognized in the same period. Maintenance and repairs are expensed as incurred; with significant additions and improvements are capitalized. Long-lived assets, including property, plant and equipment, are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset or group of asset(s) may not be recoverable based on estimated future undiscounted cash flows. The amount of impairment, if any, is measured as the difference between the net book value and the estimated fair value of the asset(s).
	Investments The Company’s nonmarketable investments are accounted for under either the cost or equity method of accounting, as appropriate. All nonmarketable investments are periodically reviewed to determine whether declines, if any, in fair value below cost basis are other-than-temporary. If the decline in fair value is determined to be other-than-temporary, an impairment loss is recorded and the investment is written down to a new cost basis.
	Fair Value of Financial Instruments The carrying value of cash equivalents, accounts receivable, accounts payable, accrued payroll and related benefits, and other accrued liabilities approximates fair value due to the short maturity of those instruments.
	The fair value of long-term debt, including current maturities, based upon models utilizing market observable (Level 2) inputs and credit risk, was $764 million at December 31, 2014 compared to the carrying amount of long-term debt, including current maturities, of $767 million.
	Goodwill and Intangible Assets Goodwill represents the excess of acquisition costs over the fair value of the net assets of businesses acquired. Goodwill is not amortized, but instead tested at least annually for impairment. Goodwill is also tested for impairment as changes in circumstances occur indicating that the carrying value may not be recoverable. At August 31, 2014, the Company's annual testing date, it was determined there was no impairment of its goodwill.
	Amortizable intangible assets include, among other items, patented, unpatented and other developed technology and customer-based intangibles, and are amortized using the straight-line method over their respective estimated useful lives of 3 to 15 years. The Company reviews intangible assets, along with other long-lived assets - primarily property, plant and equipment - for impairment if changes in circumstances or the occurrence of events suggest the remaining value may not be recoverable. At December 31, 2014, the Company concluded there was no impairment of its intangible assets.
	Derivative Financial Instruments The Company records derivatives as assets or liabilities on the balance sheet and measures such instruments at fair value. Changes in fair value of derivatives are recorded each period in the Company’s consolidated statements of operations.
	The Company periodically enters into forward foreign currency contracts to reduce exposures relating to rate changes in certain foreign currencies. Certain exposures to credit losses related to counterparty nonperformance exist. However, the Company does not anticipate nonperformance by the counterparties since they are large, well-established financial institutions. None of these derivatives is accounted for as a hedge transaction. Accordingly, changes in the fair value of forward foreign currency contracts are recorded as other expense (income), net, in the Company’s consolidated statements of operations. The fair values of the Company’s derivative financial instruments are based on prices quoted by financial institutions for these instruments.
	Foreign Currency Translation Assets and liabilities of foreign subsidiaries are generally translated from foreign currencies into U.S. dollars at period-end exchange rates, and the resulting gains and losses arising from translation of net assets located outside the U.S. are recorded as a cumulative translation adjustment, a component of accumulated other comprehensive income in the consolidated balance sheets. Income statement amounts are translated at the weighted average exchange rates for the year. Translation adjustments are not adjusted for income taxes, as substantially all translation adjustments relate to permanent investments in non-U.S. subsidiaries. Gains and losses resulting from foreign currency transactions are included in other expense (income), net, in the Company's consolidated statements of operations.
	Revenue Recognition Revenue and the related cost of sales are generally recognized upon shipment of the products. Revenue for product sales is recognized upon delivery, when persuasive evidence of an arrangement exists, when title and risk of loss have been transferred to the customer, collectability is reasonably assured, and pricing is fixed or determinable. Shipping and handling fees related to sales transactions are billed to customers and are recorded as revenue.
	The Company sells its products throughout the world primarily to companies in the microelectronics industry. The Company performs continuing credit evaluations of its customers and generally does not require collateral. Letters of credit may be required from its customers in certain circumstances. The Company provides for estimated returns based on historical and current trends in both sales and product returns.
	The Company collects various sales and value-added taxes on certain product and service sales that are accounted for on a net basis.
	Shipping and Handling Costs Shipping and handling costs incurred are recorded in cost of sales in the Company's consolidated statements of operations.
	Engineering, Research and Development Expenses Engineering, research and development costs are expensed as incurred.
	Share-based Compensation The Company measures the cost of employee services received in exchange for the award of equity instruments based on the fair value of the award at the date of grant. The cost is recognized over the period during which an employee is required to provide services in exchange for the award. Compensation expense is based on the grant date fair value. Because share-based compensation expense recognized in the Company's consolidated statements of operations is based on awards ultimately expected to vest, it has been reduced for expected forfeitures, which are estimated at the time of grant with such estimates revised, if necessary, in subsequent periods if actual forfeitures differ from those estimates.
	Income Taxes The Company accounts for income taxes under the asset and liability method, which requires the recognition of deferred tax assets and liabilities for the expected future tax consequences of events that have been included in the financial statements. Under this method, deferred tax assets and liabilities are determined on the basis of the differences between the financial statements and tax basis of assets and liabilities using enacted tax rates in effect for the year in which the differences are expected to reverse. The effect of a change in tax rates on deferred tax assets and liabilities is recognized in income tax expense in the period that includes the enactment date.
	The Company recognizes deferred tax assets to the extent that it believes these assets are more likely than not to be realized. A valuation allowance is recorded to reduce deferred tax assets when it is more likely than not that the Company would not be able to realize all or part of its deferred tax assets. In making such a determination, the Company considers all available positive and negative evidence, including future reversals of existing temporary differences, projected future taxable income, tax-planning strategies, and results of recent operations. If the Company determines that it would be able to realize its deferred tax assets in the future in excess of their net recorded amount, the Company would make an adjustment to the deferred tax asset valuation allowance, which would reduce the provision for income taxes.
	The Company’s policy for recording interest and penalties associated with audits and unrecognized tax benefits is to record such items as a component of income before taxes. Penalties and interest to be paid or received are recorded in other expense (income), net, in the statement of operations.
	Comprehensive (Loss) Income Comprehensive income represents the change in equity resulting from items other than shareholder investments and distributions. The Company’s foreign currency translation adjustments, unrealized gains and losses on available-for-sale investments, and minimum pension liability adjustments are included in accumulated other comprehensive income. Comprehensive income and the components of accumulated other comprehensive income are presented in the accompanying consolidated statements of equity and comprehensive (loss) income.
	Recent Accounting Pronouncements
	Accounting Standards Updates issued but not effective for the Company until after December 31, 2014 are not expected to have a material effect on the Company’s consolidated financial statements.

Acquisitions

Acquisitions	12 Months Ended
	Dec. 31, 2014
Acquisitions [Abstract]
Acquisitions	ACQUISITIONS

	ATMI

	On April 30, 2014, the Company acquired ATMI, Inc. (the Merger), a Delaware corporation (ATMI), for approximately $1.1 billion in cash pursuant to an Agreement and Plan of Merger (the Merger Agreement), dated as of February 4, 2014. As a result of the Merger, ATMI became a wholly-owned subsidiary of the Company. The Merger was accounted for under the acquisition method of accounting and the results of operations of ATMI are included in the Company's consolidated financial statements as of and since April 30, 2014. Direct costs of $13.3 million associated with the acquisition of ATMI, consisting of professional and consulting fees, and bridge financing costs, were expensed as incurred in the year ended December 31, 2014. These costs are included in selling, general and administrative expense and interest expense, respectively, in the Company's consolidated statements of operations.

	ATMI is a leading supplier of high-performance materials, materials packaging and materials delivery systems used worldwide in the manufacture of microelectronic devices. These products consist of “front-end” semiconductor performance materials, sub-atmospheric pressure gas delivery systems for safe handling and delivery of toxic and hazardous gases, and high-purity materials packaging and dispensing systems that allow for the reliable introduction of low volatility liquids and solids to microelectronics processes. The acquisition was executed to expand the Company’s product offering base and technological base, and enhance the leverage of its selling and administrative functions. ATMI’s sales for the year ended December 31, 2013 were approximately $361 million.

	The purchase price of ATMI consisted of the following:


	(In thousands):
	Cash paid to ATMI shareholders	$	1,099,033

	Cash paid in settlement of share-based compensation awards	31,451

	Total purchase price	1,130,484

	Less cash and cash equivalents acquired	321,094

	Total purchase price, net of cash acquired	$	809,390


	Under the terms of the Merger Agreement, the Company paid $34 per share for all outstanding common shares of ATMI (excluding treasury shares). In addition, the Company settled all outstanding share-based compensation awards held by ATMI employees at the same per share price. The acquisition method of accounting requires the Company to include the amount associated with pre-combination service as consideration in the acquisition, reflected in the table immediately above, while the fair value of the unvested portion of the awards in the amount of $21.3 million is recorded as expense, classified as selling, general and administrative expense, in the Company's consolidated statement of operations.

	The Merger was funded with existing cash balances as well as funds raised by the Company through the issuance of debt in the form of a senior secured term loan in an aggregate principal amount of $460 million and senior unsecured notes in an aggregate principal amount of $360 million as described in note 7 to the consolidated financial statements.

	The following table summarizes the allocation of the purchase price to the fair values assigned to the assets acquired and liabilities assumed at the date of the ATMI acquisition:


	(In thousands):
	Accounts receivable and other current assets	$	107,967

	Inventory	115,507

	Property, plant and equipment	126,302

	Identifiable intangible assets	297,040

	Other noncurrent assets	13,216

	Current liabilities	(60,056		)
	Deferred tax liabilities and other noncurrent liabilities	(122,710		)
	Net assets acquired	477,266

	Goodwill	332,124

	Total purchase price, net of cash acquired	$	809,390


	The fair value write-up of acquired finished goods inventory was $48.6 million. This amount was recorded as an incremental cost of sales charge, amortized over the expected turn of the acquired inventory, during the year ended December 31, 2014.

	The fair value of acquired property, plant and equipment of $126.3 million is valued at its value-in-use and is provisional pending the Company's completion of its valuation of certain assets, and its final review thereof.

	The fair value of the acquired intangible assets is $297.0 million. The acquired intangible assets, all of which are finite-lived, have a weighted average useful life of approximately 8.3 years and are being amortized on a straight-line basis. The intangible assets that comprise the amount include customer relationships of $165.1 million (10-year weighted average useful life), developed technology and related trade names of $120.8 million (6-year weighted average useful life), and other intangible assets of $11.1 million (7.4-year weighted average useful life).

	The fair value of acquired identifiable intangible assets was determined using the “income approach” on an individual project basis. In performing these valuations, the key underlying probability-adjusted assumptions of the discounted cash flows were projected revenues, gross margin expectations and operating cost estimates. The valuations were based on the information that was available as of the acquisition date and the expectations and assumptions that have been deemed reasonable by the Company’s management. There are inherent uncertainties and management judgment required in these determinations. The fair value measurements of the assets acquired and liabilities assumed were based on valuations involving significant unobservable inputs, or Level 3 in the fair value hierarchy.

	The purchase price of ATMI exceeded the net of the acquisition-date amounts of the identifiable assets acquired and the liabilities assumed by $332.1 million, which reflects adjustments made during the fourth quarter by the Company to its preliminary allocations of the purchase price to the fair values assigned to the assets acquired and liabilities assumed recorded in prior quarters, primarily related to ATMI's property, plant and equipment, intangible assets and tax accounts. Cash flows used to determine the purchase price included strategic and synergistic benefits (investment value) specific to the Company, which resulted in a purchase price in excess of the fair value of identifiable net assets. The purchase price also included the fair values of other assets that were not identifiable, not separately recognizable under accounting rules (e.g., assembled workforce) or of immaterial value in addition to a going-concern element that represents the Company's ability to earn a higher rate of return on the group of assets than would be expected on the separate assets as determined during the valuation process. This additional investment value resulted in goodwill. No amount of goodwill is expected to be deductible for income tax purposes.

	The final valuation of assets acquired and liabilities assumed is expected to be completed as soon as possible, but no later than one year from the acquisition date. Given the size and complexity of the acquisition, the valuation of certain assets and liabilities, is still being completed, and is subject to final review. Specifically, certain property, plant and equipment, as noted above, and ATMI's tax accounts are provisional pending the completion of and review of such assets and liabilities. To the extent that the Company's estimates require adjustment, the Company will modify the values.

	Subsequent to the Merger, the Company agreed to make severance payments of $7.5 million to ATMI executives. Under the terms of various agreements, the executives are unable to compete with the Company for specified periods. Based on the Company's analysis, the payments associated with these noncompete clauses were capitalized as finite-lived intangible assets to be amortized over periods averaging 1.6 years. The fair value of these noncompete clauses was determined using the “income approach” on an individual executive basis, following a methodology similar to the one described above for acquired identifiable intangible assets.

Pro Forma Results (Unaudited)

The following unaudited pro forma financial information presents the combined results of operations of the Company as if the acquisition of ATMI had occurred as of the beginning of the years presented. The unaudited pro forma financial information is not necessarily indicative of what the Company’s consolidated results of operations actually would have been had the acquisition occurred at the beginning of each year. In addition, the unaudited pro forma financial information does not attempt to project the future results of operations of the combined company.


	Year ended
(In thousands, except per share data) (Unaudited)	31-Dec-14			31-Dec-13
Net sales	$	1,076,334		$	1,051,175

Net income	68,279			60,324

Per share amounts:
Net income per common share - basic	$	0.49		$	0.43

Net income per common share - diluted	0.49			0.43


The unaudited pro forma financial information above gives effect to the following:


a.	The elimination of transactions between Entegris and ATMI, which upon completion of the merger would be considered intercompany. This reflects the elimination of intercompany sales and associated intercompany accounts.

b.	Incremental amortization and depreciation expense related to the estimated fair value of identifiable intangible assets and property, plant and equipment from the purchase price allocation.

c.	Removal of the operating results of ATMI's discontinued operations.

The unaudited pro forma financial information above for the year ended December 31, 2014 excludes the purchase accounting impact of the incremental charge reported in cost of sales for the sale of acquired inventory that was written-up to fair value of $48.6 million.

The pro forma data does not include data for Jetalon Solutions, Inc. for the period prior to its acquisition due to the immaterial impact on the pro forma financial information for the year ended December 31, 2014.

Jetalon

On April 1, 2013, the Company acquired substantially all the operating assets and liabilities of Jetalon Solutions, Inc. (Jetalon), a California-based supplier of fluid metrology products. The transaction was accounted for under the acquisition method of accounting and the results of operations of the entity are included in the Company's consolidated financial statements as of and since April 1, 2013. The acquisition of Jetalon’s assets and liabilities did not constitute a material business combination.

The purchase price for Jetalon included cash consideration of $13.4 million, funded from the Company's then-existing cash on hand, and earnout-based contingent consideration of up to $14.5 million based on the operating performance of Jetalon in 2013, 2014 and 2015. Costs associated with the acquisition of Jetalon were not significant and were expensed as incurred.

Upon acquisition, the Company recorded a contingent consideration obligation of $3.1 million representing the fair value of the earnout-based contingent consideration. This amount was estimated through a valuation model that incorporates probability-adjusted assumptions relating to the achievement of possible operating results and the likelihood of the Company making payments. This fair value measurement is based upon significant inputs not observable in the market and therefore represents a Level 3 measurement.

The purchase price of Jetalon consisted of the following:


(In thousands):
Cash paid at closing	$	13,358

Contingent consideration obligation	3,094

Total purchase price	$	16,452


The following table summarizes the allocation of the purchase price to the fair values assigned to the assets acquired and liabilities assumed at the date of the Jetalon acquisition:


(In thousands):
Accounts receivable, inventory and other assets		$	944

Identifiable intangible assets		5,634

Current liabilities		(216		)
Net assets acquired		6,362

Goodwill		10,090

Total purchase price		$	16,452


The purchase price of Jetalon, including the Company's valuation of contingent consideration, exceeded the net of the acquisition-date amounts of the identifiable assets acquired and the liabilities assumed by $10.1 million. Cash flows used to determine the purchase price included strategic and synergistic benefits (investment value) specific to the Company, which resulted in a purchase price in excess of the fair value of identifiable net assets. The purchase price also included the fair values of other assets that were not identifiable, not separately recognizable under accounting rules (e.g., assembled workforce) or of immaterial value in addition to a going-concern element that represents the Company's ability to earn a higher rate of return on the group of assets than would be expected on the separate assets as determined during the valuation process. This additional investment value resulted in goodwill, which is expected to be deductible for income tax purposes. The goodwill has been assigned to the Company's fluid management reporting unit.

The Company completed its fair value determinations for all elements of the Jetalon acquisition in 2013. Intangible assets, consisting mostly of technology-related intellectual property, are being amortized on a straight-line basis over an estimated useful life of approximately 10 years.

Subsequent changes in the fair value of this obligation have been recognized as adjustments to the contingent consideration obligation and reflected in the Company's consolidated statements of operations. During the years ended December 31, 2014 and 2013, the Company updated its assessment of the contingent consideration based on the valuation methodology described above and recorded gains of $1.3 million and $1.8 million in the Company's consolidated statements of operations, resulting in the reversal of the contingent consideration obligation.

Entegris Precision Technologies Corporation (EPT)

On April 2, 2012, the Company acquired the remaining 50% of its Entegris Precision Technologies Corporation (EPT) joint venture in Taiwan, an equity method investee in which it had previously owned a 50% equity interest accounted for under the equity method. The Company paid $3.4 million in cash for the additional 50% equity interest in the entity. The transaction was accounted for under the acquisition method of accounting and the results of operations of the entity are included in the Company's consolidated financial statements as of and since April 2, 2012. EPT's sales and operating results were not material to the Company's consolidated financial statements.
The Company remeasured its previously held equity interest in the entity at its April 2, 2012 fair value of $2.9 million. Based on the carrying value of the Company's equity interest in EPT before the business combination, the Company recognized a gain of $1.3 million. In addition, in prior reporting periods the Company recognized changes in the value of its equity interest in EPT related to translation adjustments in other comprehensive income. As required under the acquisition method of accounting, the $0.2 million recognized previously in other comprehensive income was reclassified and added in the calculation of the gain noted above.
The purchase price was allocated based on the fair values of all of the assets acquired and liabilities assumed. The sum of the purchase price of the additional 50% equity interest and the fair value of the equity interest in the investee held by the Company at the acquisition date exceeded the net of the acquisition-date amounts of the identifiable assets acquired and the liabilities assumed by $2.2 million, resulting in goodwill, which is not deductible for income tax purposes. EPT is part of the Company’s liquid packaging reporting unit.

As described above, the Company acquired businesses in 2014, 2013 and 2012. As part of the accounting for these transactions, the Company allocated the purchase price of the acquired entities based on the fair value of all the assets acquired and liabilities assumed. The valuation of the assets acquired and liabilities assumed, as well as the Company's contingent consideration obligation in the case of Jetalon and the Company's previously held equity interest in the case of EPT, was based on the information that was available as of the acquisition date and the expectations and assumptions that have been deemed reasonable by the Company's management.

In performing these valuations, the Company used independent appraisals, discounted cash flows and other factors as the best evidence of fair value. The key underlying assumptions of the discounted cash flows were projected revenues, gross margin expectations and operating cost estimates. There are inherent uncertainties and management judgment required in these determinations. No assurance can be given that the underlying assumptions will occur as projected. The fair value measurements of the assets acquired and liabilities assumed were based on valuations involving significant unobservable inputs, or Level 3 in the fair value hierarchy.

Trade_Accounts_and_Notes_Recei

Trade Accounts and Notes Receivable	12 Months Ended
	Dec. 31, 2014
Accounts, Notes, Loans and Financing Receivable, Gross, Allowance, and Net [Abstract]
Trade Accounts and Notes Receivable	TRADE ACCOUNTS AND NOTES RECEIVABLE
	Trade accounts and notes receivable from customers at December 31, 2014 and 2013 consist of the following:


	(In thousands)	2014		2013
	Accounts receivable	$	151,082	$	94,613

	Notes receivable	4,706		9,039

		155,788		103,652

	Less allowance for doubtful accounts	1,827		1,779

		$	153,961	$	101,873

Inventories

Inventories	12 Months Ended
	Dec. 31, 2014
Inventories	INVENTORIES
	Inventories at December 31, 2014 and 2013 consist of the following:


	(In thousands)	2014		2013
	Raw materials	$	41,015	$	26,012

	Work-in-process	14,190		10,512

	Finished goods (a)	107,431		56,998

	Supplies	489		552

		$	163,125	$	94,074


	(a)	Includes consignment inventories held by customers for $11.0 million and $5.1 million at December 31, 2014 and 2013,

Property_Plant_and_Equipment

Property, Plant and Equipment	12 Months Ended
	Dec. 31, 2014
Property, Plant and Equipment	PROPERTY, PLANT AND EQUIPMENT
	Property, plant, and equipment at December 31, 2014 and 2013 consists of the following:


	(In thousands)	2014		2013		Estimated
						useful lives in
						years
	Land	$	15,064	$	12,866

	Buildings and improvements	150,450		109,105		May-35

	Manufacturing equipment	214,509		168,197		10-May

	Canisters and cylinders	42,154		—		12-Mar

	Molds	80,532		76,909		5-Mar

	Office furniture and equipment	99,624		70,158		8-Mar

	Construction in progress	27,185		33,021

		629,518		470,256

	Less accumulated depreciation	315,949		283,816

		$	313,569	$	186,440

	The table below sets forth the depreciation expense for the years ended December 31, 2014, 2013, and 2012:


	(In thousands)	2014		2013		2012
	Depreciation expense	$	46,637	$	29,468	$	28,013

Intangible_Assets

Intangible Assets	12 Months Ended
	Dec. 31, 2014
Intangible Assets	GOODWILL AND INTANGIBLE ASSETS

	Goodwill activity for each of the Company's two reportable segments, Critical Materials Handling (CMH) and Electronic Materials (EM), was as follows:


	(In thousands)	CMH			EM			Total
	31-Dec-12	$	2,209		$	—		$	2,209

	Addition due to acquisition	10,090			—			10,090

	Other, including foreign currency translation	(25		)	—			(25		)

	31-Dec-13	12,274			—			12,274

	Addition due to acquisition	35,329			296,795			332,124

	Other, including foreign currency translation	(120		)	(3,535		)	(3,655		)
	31-Dec-14	$	47,483		$	293,260		$	340,743


	As of December 31, 2014, goodwill amounted to approximately $340.7 million, an increase of $328.5 million from the balance at December 31, 2013. The increase in goodwill relates to the acquisition of ATMI completed in April 2014 as described in note 2 and is provisional subject to the Company's final valuation of assets acquired and liabilities assumed. The increase was partially offset by the foreign currency translation adjustments.
	Identifiable intangible assets at December 31, 2014 and 2013 consist of the following:


	2014
	(In thousands)	Gross carrying			Accumulated			Net carrying			Weighted
		Amount			amortization			value			average life in
											years
	Patents	$	1,347		$	779		$	568		9.8

	Developed technology	199,402			78,785			120,617			6.6

	Trademarks and trade names	17,152			8,883			8,269			9.8

	Customer relationships	220,420			54,452			165,968			10.3

	Other	16,768			3,636			13,132			6.6

		$	455,089		$	146,535		$	308,554		8.5



	2013
	(In thousands)	Gross carrying			Accumulated			Net carrying			Weighted
		amount			amortization			value			average life in
											years
	Patents	$	1,369		$	649		$	720		9.8

	Developed technology	78,686			62,257			16,429			7.4

	Trademarks and trade names	13,092			7,306			5,786			12

	Customer relationships	57,617			39,146			18,471			11

	Other	2,213			110			2,103			13.3

		$	152,977		$	109,468		$	43,509		9.3

	The table below sets forth the amortization expense for the years ended December 31, 2014, 2013, and 2012:


	(In thousands)	2014			2013			2012
	Amortization expense	$	37,067		$	9,347		$	9,594

The amortization expense for each of the five succeeding years and thereafter relating to intangible assets currently recorded in the Company's consolidated balance sheets is estimated to be the following at December 31, 2014:



Fiscal year ending December 31	(In thousands)
2015	$	47,835

2016	45,401

2017	43,977

2018	42,725

2019	40,472

Thereafter	88,144

	$	308,554

Debt

Debt	12 Months Ended
	Dec. 31, 2014
Debt [Abstract]
Debt	DEBT

	Long-term debt at December 31, 2014 consists of the following:


	(In thousands)	31-Dec-14
	Senior secured term loan facility due 2021	$	406,796

	Senior unsecured notes due 2022	360,000

	Total long-term debt	766,796

	Less current maturities of long-term debt	100,000

	Long-term debt less current maturities	$	666,796


	Annual maturities of long-term debt contractually due as of December 31, 2014 are as follows:


	Fiscal year ending	(In thousands)
	2015	$	26,597

	2016	—

	2017	—

	2018	—

	2019	—

	Thereafter	740,199

		$	766,796


	Under the terms of the Term Loan Facility, the Company is obligated to remit payments of approximately $26.6 million on the Term Loan Facility in 2015. However, based on management's plans and intent, the Company reflects $100 million as the current maturity of long-term debt in its consolidated balance sheet as of December 31, 2014. During the year ended December 31, 2014, the Company made payments of $51.2 million on the Term Loan Facility, reducing the contractual principal payments otherwise due in 2015.

	As described in note 2 to the consolidated financial statements, the Company issued debt with a principal amount of $820 million to supply the funding required to complete its acquisition of ATMI. Debt issuance costs of $2.3 million paid directly to lending institutions are recorded as a debt discount, while debt issuance costs of $20.7 million paid to third parties are capitalized as debt issuance costs, and reflected within other current and other noncurrent assets. These debt issuance costs are being amortized as interest expense over the term of the debt instrument using the effective-interest method for the senior secured term loan facility and senior unsecured notes, and the straight-line method for the senior secured asset-based revolving credit facility. In the year ended December 31, 2014, the Company expensed $5.8 million of the debt issuance costs, including $4.0 million for bridge financing fees paid for the availability of funding for the acquisition of ATMI. These amounts are included in interest expense in the Company's consolidated statements of operations.

	Senior Secured Term Loan Facility and Security Agreement
	On April 30, 2014, the Company entered into a term loan credit and guaranty agreement with Goldman Sachs Bank USA, as administrative agent, collateral agent, sole lead arranger, sole bookrunner and sole syndication agent (the Term Loan Facility), that provides senior secured financing of $460 million (which may be increased by up to $225 million in certain circumstances). Borrowings under the Term Loan Facility bear interest at a rate per annum equal to, at the Company’s option, a base rate (such as prime rate or LIBOR) plus, an applicable margin. The Company's interest rate is 3.5% at December 31, 2014. In addition to paying interest on outstanding principal under the Term Loan Facility, the Company is required to pay customary agency fees.
	During the year ended December 31, 2014, the Company made payments of $51.2 million on the Term Loan Facility.
	The credit agreement governing the Term Loan Facility requires the Company to prepay outstanding term loans, subject to certain exceptions, with (a) up to 50% of the Company’s annual Excess Cash Flow (as defined in the credit agreement governing the Term Loan Facility) and (b) 100% of the net cash proceeds of (i) certain asset sales and casualty and condemnation events, subject to reinvestment rights and certain other exceptions; and (ii) any incurrence or issuance of certain debt, other than debt permitted under the Term Loan Facility.
	The Company may voluntarily prepay outstanding loans under the Term Loan Facility at any time without premium or penalty other than customary “breakage” costs with respect to LIBOR loans.
	All obligations under the Term Loan Facility are unconditionally guaranteed by certain of the Company’s existing wholly owned domestic subsidiaries, and are secured, subject to certain exceptions, by substantially all of the Company’s assets and the assets of the Company's subsidiary guarantors.

	The Term Loan Facility contains a number of negative covenants that, subject to certain exceptions, restrict the Company’s ability and each of the Company’s subsidiaries ability to incur additional indebtedness; pay dividends on its capital stock or redeem, repurchase or retire its capital stock or its other indebtedness; make investments, loans and acquisitions; create restrictions on the payment of dividends or other amounts to the Company from the Company’s restricted subsidiaries; engage in transactions with its affiliates; sell assets, including capital stock of its subsidiaries; materially alter the business it conducts; consolidate or merge; incur liens; and engage in sale-leaseback transactions. The credit agreement governing the Term Loan Facility additionally contains certain customary representations and warranties, affirmative covenants and provisions relating to events of default. The Company is in compliance with all of the above covenants at December 31, 2014.

	2022 Senior Unsecured Notes
	On April 1, 2014, the Company issued $360 million aggregate principal amount of 6% senior unsecured notes due April 1, 2022 (the 2022 Senior Unsecured Notes). The 2022 Senior Unsecured Notes were issued under an indenture dated as of April 1, 2014 (the 2022 Senior Unsecured Notes Indenture) by and among the Company and Wells Fargo Bank, National Association, as trustee (the 2022 Senior Unsecured Notes Trustee). Interest on the 2022 Senior Unsecured Notes is payable semi-annually in arrears on April 1 and October 1, commencing October 1, 2014.
	The 2022 Senior Unsecured Notes are guaranteed, jointly and severally, fully and unconditionally, on an unsecured senior basis, by each of the Company’s domestic subsidiaries (the Guarantors) that guarantee indebtedness under the Company’s senior secured term loan facility and senior secured asset-based revolving credit facility (Senior Secured Credit Facilities).
	As provided in the Senior Unsecured Notes Indenture, the Company may at its option on one or more occasions redeem all or a part of the 2022 Senior Unsecured Notes at a redemption price equal to (a) 100% of the principal amount of the 2022 Senior Unsecured Notes redeemed plus a make-whole premium if redeemed prior to April 1, 2017, or (b) a percentage of principal amount between a percentage from 100% and 104.5% of the aggregate principal amount of notes to be redeemed depending on the period of redemption, if redeemed on or after April 1, 2017, plus, in each case, accrued and unpaid interest thereto.
	Upon a change in control, the Company is required to offer to purchase all of the 2022 Senior Unsecured Notes at a price in cash equal to 101% of the aggregate principal amount thereof, plus accrued and unpaid interest, if any, to, but not including, the date of purchase.

	If the Company or its subsidiaries engage in asset sales, the Company generally must either invest the net cash proceeds from such sales in its business within a period of time, prepay debt under the Senior Secured Credit Facilities or make an offer to purchase a principal amount of the 2022 Senior Unsecured Notes equal to the excess net cash proceeds, subject to certain exceptions.

	The 2022 Senior Unsecured Notes Indenture contains covenants that, among other things, limit the Company’s ability and the ability of the Company’s restricted subsidiaries to pay dividends or distributions or redeem or repurchase equity; prepay subordinated debt or make certain investments, loans, advances and acquisitions; incur or guarantee additional debt, or issue certain disqualified stock and preferred stock; create liens; engage in a consolidation or merger, or sell, transfer or otherwise dispose of all or substantially all of their assets; enter into transactions with affiliates; and create restrictions on the payment of dividends or other amounts to the Company from its restricted subsidiaries. The Company is in compliance with all of the above covenants at December 31, 2014.

	The 2022 Senior Unsecured Notes Indenture also provides for events of default which, if certain of them occur, would permit the 2022 Senior Unsecured Notes Trustee or the holders of at least 25% in aggregate principal amount of the then total outstanding 2022 Senior Unsecured Notes to declare the principal, premium, if any, interest and any other monetary obligations on all the then-outstanding 2022 Senior Unsecured Notes to be due and payable immediately.

	Senior Secured Asset-Based Revolving Credit Facility and Security Agreement
	On April 30, 2014, the Company entered into an asset-based credit agreement with Goldman Sachs Bank USA, as administrative agent, collateral agent, sole lead arranger, sole bookrunner and sole syndication agent (the ABL Facility), that provides senior secured financing of $75 million (which may be increased by up to $35 million in certain circumstances), subject to a borrowing base limitation. The borrowing base for the ABL Facility at any time equals the sum of certain percentages of various accounts and inventories and stood at $64.6 million at December 31, 2014. The ABL Facility includes borrowing capacity in the form of letters of credit up to $35 million of the facility, and up to $20 million in U.S. dollars for borrowings on same-day notice, referred to as swingline loans.

Borrowings under the ABL Facility bear interest at a rate per annum equal to, at the Company’s option, a base rate (prime rate or LIBOR), plus an applicable margin. Swingline loans shall bear interest at a rate per annum equal to the base rate plus the applicable margin.
In addition to paying interest on outstanding principal under the ABL Facility, the Company is required to pay a commitment fee of 0.33% per annum in respect of the unutilized commitments thereunder. The Company must also pay customary letter of credit fees and agency fees.
The Company may voluntarily reduce the unutilized portion of the commitment amount and repay outstanding loans at any time. Prepayments of the loans may be made without premium or penalty other than customary “breakage” costs with respect to LIBOR loans.
During the year ended December 31, 2014, the Company borrowed and repaid $37.5 million in borrowings under the ABL Facility. There is no outstanding balance under the ABL Facility at December 31, 2014.
There is no scheduled amortization under the Company’s ABL Facility. The principal amount outstanding under the ABL Facility is due and payable in full on April 30, 2019.

All obligations under the ABL Facility are unconditionally guaranteed by certain of the Company’s existing wholly owned domestic subsidiaries and are secured, subject to certain exceptions, by substantially all of the Company’s assets and the assets of the Company's subsidiaries that have guaranteed the ABL Facility.

The ABL Facility contains a number of negative covenants that, among other things, subject to certain exceptions, restrict the Company’s ability and the ability of each of the Company’s subsidiaries to incur additional indebtedness; pay dividends on its capital stock or redeem, repurchase or retire its capital stock or its other indebtedness; make investments, loans and acquisitions; create restrictions on the payment of dividends or other amounts to the Company from the Company’s restricted subsidiaries; engage in transactions with its affiliates; sell assets, including capital stock of its subsidiaries; materially alter the business it conducts; consolidate or merge; incur liens; and engage in sale-leaseback transactions. The credit agreement governing the ABL Facility additionally contains certain customary representations and warranties, affirmative covenants and provisions relating to events of default. The Company is in compliance with all of the above covenants at December 31, 2014.

Intercreditor Agreement
In connection with the closing of the ABL Facility and Term Loan Facility, on April 30, 2014, Goldman Sachs Bank USA, as collateral agent for the ABL Facility and as collateral agent for the Term Loan Facility, entered into an intercreditor agreement (the Intercreditor Agreement), acknowledged by the Company, which governs the relative priorities (and certain other rights) of the ABL Facility lenders and Term Loan Facility lenders pursuant the respective security agreements that each entered into with the Company and the guarantors.

Lease_Commitments

Lease Commitments	12 Months Ended
	Dec. 31, 2014
Lease Commitments	LEASE COMMITMENTS
	As of December 31, 2014, the Company was obligated under noncancellable operating lease agreements for certain sales offices and manufacturing facilities, manufacturing equipment, vehicles, information technology equipment and warehouse space. Future minimum lease payments for noncancellable operating leases with initial or remaining terms in excess of one year are as follows:



	Fiscal year ending December 31	(In thousands)
	2015	$	10,708

	2016	6,810

	2017	4,596

	2018	3,738

	2019	948

	Thereafter	292

	Total minimum lease payments	$	27,092

	Total rental expense for all equipment and building operating leases for the years ended December 31, 2014, 2013, and 2012, were $13.3 million, $9.5 million, and $9.4 million, respectively.

Asset_Retirement_Obligations_N

Asset Retirement Obligations (Notes)	12 Months Ended
	Dec. 31, 2014
Asset Retirement Obligation [Abstract]
Asset Retirement Obligations	ASSET RETIREMENT OBLIGATIONS

	In connection with the acquisition of ATMI described in note 2, the Company assumed asset retirement obligations (AROs) related to environmental disposal obligations associated with cylinders used to supply customers with ATMI's products, and certain restoration obligations associated with its leased facilities. Prior to the acquisition, the Company also had AROs related certain restoration obligations associated with its leased facilities.

	Changes in the carrying amounts of the Company’s AROs at December 31, 2014 are shown below:


	(In thousands)

	Balance at December 31, 2013	$	2,167

	Liabilities assumed in ATMI acquisition	7,365

	Liabilities settled	(128		)
	Liabilities incurred	248

	Accretion expense	195

	Revision of estimate	103

	Balance at December 31, 2014	$	9,950


	The ARO liability is included in the consolidated balance sheets in other accrued liabilities, and pension benefit obligations and other liabilities.

Income_Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2014
Income Taxes	INCOME TAXES
	(Loss) income before income taxes for the years ended December 31, 2014, 2013 and 2012 was derived from the following sources:


	(In thousands)	2014				2013			2012
	Domestic	$	(118,917	)		$	29,066		$	49,056

	Foreign	105,525				67,129			50,647

	(Loss) income before income tax (benefit) expense and equity in net loss (income of affiliates	$	(13,392	)		$	96,195		$	99,703

	Income tax (benefit) expense for the years ended December 31, 2014, 2013, and 2012 is summarized as follows:


	(In thousands)	2014				2013			2012
	Current:
	Federal	$	1,574			$	854		$	5,797

	State	111				772			654

	Foreign	21,459				12,937			11,183

		23,144				14,563			17,634

	Deferred (net of valuation allowance):
	Federal	(41,484		)		6,003			11,165

	State	(1,545		)		(650		)	168

	Foreign	(1,687		)		1,753			1,914

		(44,716		)		7,106			13,247

	Income tax (benefit) expense	$	(21,572	)		$	21,669		$	30,881

	Income tax (benefit) expense differs from the expected amounts based upon the statutory federal tax rates for the years ended December 31, 2014, 2013, and 2012 as follows:


	(In thousands)	2014				2013			2012
	Expected federal income tax at statutory rate	$	(4,687	)		$	33,668		$	34,896

	State income taxes before valuation allowance, net of federal tax effect	(2,115		)		(357		)	440

	Income (losses) without tax expense (benefit)	(72		)		22			(40		)

	Effect of foreign source income	(19,996		)		(10,583		)	(5,314		)
	Tax contingencies	1,379				1,383			1,374

	Valuation allowance	2,106				445			358

	Non-deductible acquisition costs	2,176				—			—

	U.S. federal research credit	(2,085		)		(3,233		)	(790		)
	Other items, net	1,722				324			(43		)

	Income tax (benefit) expense	$	(21,572	)		$	21,669		$	30,881


	As a result of commitments made by the Company related to investments in tangible property and equipment, the establishment of a research and development center in 2006 and certain employment commitments, income from certain manufacturing activities in Malaysia is exempt from tax for years up through 2015. The income tax benefits attributable to the tax status of this subsidiary are estimated to be $8 million ($0.06 cents per diluted share), $5.4 million ($0.04 cents per diluted share), and $2.4 million ($0.02 cents per diluted share) for the years ended December 31, 2014, 2013, and 2012, respectively. The 2014 effective tax rate reflects an additional benefit of $3.3 million due to a lower tax rate than the U.S.

	In 2012, ATMI's Korea subsidiary made commitments to produce a certain line of products. In return for this commitment, the Company has a tax holiday on income earned on sales of these products for five years and a partial holiday for two additional years. The income tax benefit attributable to this tax holiday are $0.2 million ($0.0 cents per diluted share) for the year ended December 31, 2014. The 2014 effective tax rate reflects an additional benefit of $0.2 million due to a lower tax rate than the U.S.

	The Company also made employment and spending commitments to Singapore. In return for those commitments, the Company has been granted a partial tax holiday for five years and an additional partial tax holiday for an additional two years if the requirements are met. The income tax benefits attributable to the tax status are estimated to be $1.2 million ($0.01 cents per diluted share), $0.5 million ($0.00 cents per diluted share), $0 million ($0.00 cents per diluted share) for the years ending December 31, 2014, 2013, and 2012 respectively. The 2014 effective tax rate reflects an additional benefit of $3.7 million due to a lower tax rate than the U.S.
	The 2014 effective tax rate reflects a $2.6 million benefit related to foreign tax credits.
The significant components of the Company’s deferred tax assets and deferred tax liabilities at December 31, 2014 and 2013 are as follows:


(In thousands)	2014				2013
Deferred tax assets attributable to:
Accounts receivable	$	243			$	269

Inventory	5,663				2,853

Accruals not currently deductible for tax purposes	9,915				8,844

Net operating loss and credit carryforwards	12,183				3,972

Capital loss carryforward	3,088				2,779

Depreciation	10,498				1,070

Equity compensation	3,662				3,157

Asset impairments	732				732

Purchased intangible assets	—				1,439

Other, net	5,549				2,976

Gross deferred tax assets	51,533				28,091

Valuation allowance	(11,104		)		(5,435		)
Total deferred tax assets	40,429				22,656

Deferred tax liabilities attributable to:
Depreciation	—				(3,245		)

Purchased intangible assets	(77,149		)		(601		)
Total deferred tax liabilities	(77,149		)		(3,846		)
Net deferred tax (liabilities) assets	$	(36,720	)		$	18,810

Deferred tax assets are generally required to be reduced by a valuation allowance if, based on the weight of available positive and negative evidence, it is more likely than not that some portion or all of the deferred tax assets will not be realized.
As of December 31, 2014 and 2013, the Company had a net U.S. deferred tax liability of $24.8 million and a net U.S. deferred tax asset of $16.0 million, respectively, which are composed of temporary differences and various tax credit carryforwards. Management believes that it is more likely than not that the benefit from certain state net operating loss carryforwards, state credits, and a federal capital loss carryforward will not be realized. In recognition of this risk, management has provided a valuation allowance of $10.6 million and $5.4 million as of December 31, 2014 and 2013, respectively, on the related deferred tax assets. If the assumptions change and management determines the assets will be realized, the tax benefits relating to any reversal of the valuation allowance on deferred tax assets at December 31, 2014 will be recognized as a reduction of income tax expense.
As of December 31, 2014 and 2013, the Company had a net non-U.S. deferred tax liability of $1.4 million and a net non-U.S. deferred tax asset of $8.2 million, respectively, for which management determined based upon the available evidence a valuation allowance of $0.5 million as of December 31, 2014 was required against the non-U.S. gross deferred tax assets. For other non-U.S. jurisdictions, management is relying upon projections of future taxable income to utilize deferred tax assets.
At December 31, 2014, there were approximately $618.0 million of accumulated undistributed earnings of subsidiaries outside the United States, all of which are considered to be reinvested indefinitely. Management has considered its future cash needs and affirms its intention to indefinitely invest such earnings overseas to be utilized for working capital purposes, expansion of existing operations, possible acquisitions and other international items. No U.S. tax has been provided on such earnings. If they were remitted to the Company, applicable U.S. federal and foreign withholding taxes may be partially offset by available foreign tax credits. Management has concluded that it is impracticable to compute the full actual tax impact, but it estimates that $12 million of withholding taxes would be incurred if the $618.0 million were distributed.
At December 31, 2014, the Company had state operating loss carryforwards of approximately $42.4 million, which begin to expire in 2015; foreign tax credit carryforwards of approximately $7.2 million, which begin to expire in 2019; federal research and development credit carryforwards of approximately $3.6 million, which begin to expire in 2033; and foreign operating loss carryforwards of $2.7 million, which begin to expire in 2023. The Company will need approximately $31.0 million of certain types of domestic income between 2015 and 2033 to fully utilize the credit carryforwards.
Benefits from tax positions should be recognized in the financial statements only when it is more likely than not that the tax positions will be sustained upon examination by the appropriate taxing authority that would have full knowledge of all relevant information. A tax position that meets the more-likely-than-not recognition threshold is measured at the largest amount of benefit that is greater than fifty percent likely of being realized upon ultimate settlement. Tax positions that fail to meet the more-likely-than-not recognition threshold should be recognized in the first subsequent financial reporting period in which that threshold is met. Previously recognized tax positions that no longer meet the more-likely-than-not recognition threshold should be derecognized in the first subsequent financial reporting period in which that threshold is no longer met. The provisions also provide guidance on the accounting for and disclosure of unrecognized tax benefits, interest and penalties.
Reconciliations of the beginning and ending balances of the total amounts of gross unrecognized tax benefits for the years ended December 31, 2014 and 2013 are as follows:


(In thousands)	2014				2013
Gross unrecognized tax benefits at beginning of year	$	4,277			$	5,419

Increase from acquisition	2,431				—

Increases in tax positions for prior years	—				28

Decreases in tax positions for prior years	(246		)		—

Increases in tax positions for current year	2,409				1,879

Settlements	(1,385		)		(2,298		)
Lapse in statute of limitations	(1,502		)		(751		)
Gross unrecognized tax benefits at end of year	$	5,984			$	4,277

The total amount of net unrecognized tax benefits that, if recognized, would affect the effective tax rate was $4.3 million at December 31, 2014.
Penalties and interest paid or received are recorded in other income, net, in the consolidated statements of operations. For the years ended December 31, 2014 and 2013, the Company has accrued interest and penalties related to unrecognized tax benefits of $0.5 million and $0.8 million, respectively. Benefits of $0.4 million, $0.1 million and $0.0 million were recognized as interest and penalties in the consolidated statements of operations for the years ended December 31, 2014, 2013 and 2012, respectively.
The Company files income tax returns in the U.S. and in various state, local and foreign jurisdictions. The statutes of limitations related to the consolidated Federal income tax return and state returns are closed for all years up to and including 2010 and 2010, respectively. With respect to foreign jurisdictions, the statute of limitations varies from country to country, with the earliest open year for the Company’s major foreign subsidiaries being 2008.
Due to the potential for resolution of a foreign examination and the expiration of various statutes of limitations, it is reasonably possible that the Company’s gross unrecognized tax benefit balance may decrease within the next twelve months by approximately $0.2 million.

Equity

Equity	12 Months Ended
	Dec. 31, 2014
Equity	EQUITY
	Share Repurchase Program
	On December 12, 2012, the Board of Directors authorized a repurchase program covering up to an aggregate of $50.0 million of the Company’s common stock in open market transactions and in accordance with one or more pre-arranged stock trading plans established in accordance with Rule 10b5-1 under the Securities Exchange Act of 1934, as amended. Under the repurchase program, which expired on February 7, 2014, the Company repurchased $15.5 million and $0.4 million shares for the years ended December 31, 2013 and 2012, respectively.
	2010 Stock Plan
	At December 31, 2009, the Company had outstanding stock awards under five stock incentive plans: the Entegris, Inc. 1999 Long-Term Incentive and Stock Option Plan; the Entegris, Inc. Outside Directors’ Option Plan and three former Mykrolis stock option plans assumed by the Company on August 10, 2005; the 2001 Equity Incentive Plan; the 2003 Employment Inducement and Acquisition Stock Option Plan; and the 2001 Non-Employee Director Stock Option Plan. On December 17, 2009, the Company’s Board of Directors approved the 2010 Stock Plan, subject to the approval of the Company’s stockholders. On May 5, 2010, the stockholders approved the 2010 Stock Plan. The 2010 Stock Plan replaced the above existing plans for future stock awards and stock option grants. Subsequent to the replacement of the prior plans on May 5, 2010, no awards were or will be made under the prior plans.
	Subsequent to the acquisition of ATMI, the Company's Board of Directors approved the absorption of the ATMI, Inc. 2010 Stock Plan (ATMI Plan) into the Company's 2010 Stock Plan for the remainder of the term of the ATMI Plan. 5.7 million additional shares became available for grant by the Company upon absorption of the ATMI Plan.
	The 2010 Stock Plan provides for the issuance of stock options and other share-based awards to selected employees, directors, and other individuals or entities that provide services to the Company or its affiliates. The 2010 Stock Plan has a term of ten years. Under the 2010 Stock Plan, the Board of Directors or a committee selected by the Board of Directors will determine for each award, the term, price, number of shares, rate at which each award is exercisable and whether restrictions are imposed on the shares subject to the awards. The exercise price for option awards generally may not be less than the fair market value per share of the underlying common stock on the date granted. The 2010 Stock Plan allows that after December 31, 2009 any stock awards that were awarded from the expired plans mentioned above that are forfeited, expired or otherwise terminated without issuance of such stock award again be available for issuance under the 2010 Stock Plan.
	General Option Information
	Stock option activity for the 2010 Stock Plan and predecessor plans for the years ended December 31, 2014, 2013 and 2012 is summarized as follows:


		2014							2013							2012
	(Shares in thousands)	Number of			Weighted				Number of			Weighted				Number of			Weighted
		shares			average				shares			average				shares			average
					exercise							exercise							exercise
					price							price							price
	Options outstanding, beginning of year	1,961			$	8.2			2,565			$	8.2			3,561			$	6.53

	Granted	651			11.71				553			9.88				470			9.27

	Exercised	(546	)		6.56				(786	)		7.54				(1,293	)		3.76

	Expired or Forfeited	(32	)		14.06				(371	)		12.1				(173	)		9.83

	Options outstanding, end of year	2,034			$	9.67			1,961			$	8.2			2,565			$	8.2

	Options exercisable, end of year	728			$	7.92			1,001			$	6.92			1,828			$	8.18

	Options outstanding for the Company’s stock plans at December 31, 2014 are summarized as follows:


	(Shares in thousands)	Options outstanding									Options exercisable
	Range of exercise prices	Number			Weighted		Weighted-				Number			Weighted
		outstanding			average		average				exercisable			average
					remaining life		exercise							exercise
					in years		price
														price
	$0.00 to $9.40	842			3.0 years		$	7.96			602			$	7.5

	$9.88 to $9.88	541			5.1 years		9.88				126			9.88

	$11.71 to $11.71	651			6.1 years		11.71				—			—

		2,034			4.6 years		9.67				728			7.92

	The weighted average remaining contractual term for options outstanding and exercisable for all plans at December 31, 2014 was 4.6 years and 3.1 years, respectively.
	For all plans, the Company had shares available for future grants of 11.6 million shares, 6.8 million shares, and 7.7 million shares at December 31, 2014, 2013 and 2012, respectively.
	For all plans, the total pre-tax intrinsic value of stock options exercised during the years ended December 31, 2014 and 2013 was $3.3 million and $1.8 million, respectively. The aggregate intrinsic value, which represents the total pre-tax intrinsic value based on the Company’s closing stock price of $13.21 at December 31, 2014, which theoretically could have been received by the option holders had all option holders exercised their options as of that date, was $7.2 million and $3.9 million for options outstanding and options exercisable, respectively.
	Employee Stock Purchase Plan
	The Company maintains the Entegris, Inc. Employee Stock Purchase Plan (ESPP). A total of 4.0 million common shares are reserved for issuance under the ESPP. The ESPP allows employees to elect, at six-month intervals, to contribute up to 10% of their compensation, subject to certain limitations, to purchase shares of common stock at a discount of 15% from the fair market value on the first day or last day of each six-month period. The Company treats the ESPP as a compensatory plan. As of December 31, 2014, 3.8 million shares had been issued under the ESPP. At December 31, 2014, 0.2 million shares remained available for issuance under the ESPP. Employees purchased 0.2 million shares, 0.2 million shares, and 0.3 million shares, at a weighted-average price of $10.57, $8.00, and $7.34 during the years ended December 31, 2014, 2013 and 2012, respectively.
	The table below sets forth the amount of cash received by the Company from the exercise of stock options and employee contributions to the ESPP during the years ended December 31, 2014, 2013 and 2012:


	(In thousands)	2014				2013				2012
	Exercise of stock options and employee contributions to the ESPP	$	3,117			$	7,685			$	7,431

	Restricted Stock Awards
	Restricted stock awards are awards of common stock made under the 2010 Stock Plan that are subject to restrictions on transfer and to a risk of forfeiture if the awardee terminates employment with the Company prior to the lapse of the restrictions. The value of such stock is determined using the market price on the grant date. Compensation expense for restricted stock awards is generally recognized using the straight-line single-option method. A summary of the Company’s restricted stock activity for the years ended December 31, 2014, 2013 and 2012 is presented in the following table:


		2014							2013							2012
	(Shares in thousands)	Number			Weighted				Number			Weighted				Number			Weighted
		of			average				of			average				of			average
		shares			grant date				shares			grant date				shares			grant date
		fair value					fair value					fair value
Unvested, beginning of year		1,570				$	8.98					1,802			$	7.02			2,298		$	5.49

Granted	834			11.59				717			9.85				744			9.21

Vested	(686	)		8.32				(871	)		5.67				(1,132	)		5.42

Forfeited	(105	)		10.14				(78	)		8.66				(108	)		6.22

Unvested, end of year	1,613			10.53				1,570			8.98				1,802			7.02

The weighted average remaining contractual term for unvested restricted shares at December 31, 2014 and 2013 was 2.3 years and 2.0 years, respectively.
As of December 31, 2014, the total compensation cost related to unvested stock options and restricted stock awards not yet recognized was $3.7 million and $11.8 million, respectively, and is expected to be recognized over the next 2.6 years on a weighted-average basis.
Valuation and Expense Information
The Company recognizes compensation expense for all share-based payment awards made to employees and directors based on their estimated fair values on the date of grant. Share-based compensation expense is based on the value of the portion of share-based payment awards that is ultimately expected to vest during the period.The following table summarizes the allocation of share-based compensation expense related to employee stock options, restricted stock awards and grants under the employee stock purchase plan for the years ended December 31, 2014, 2013 and 2012:


(In thousands)	2014				2013				2012
Cost of sales	$	809			$	690			$	575

Engineering, research and development expenses	705				502				500

Selling, general and administrative expenses	7,373				6,736				8,806

Share-based compensation expense	8,887				7,928				9,881

Tax benefit	2,746				2,643				3,686

Share-based compensation expense, net of tax	$	6,141			$	5,285			$	6,195

Stock Options
Share-based payment awards in the form of stock option awards for 0.7 million, 0.6 million and 0.5 million options were granted to employees during the years ended December 31, 2014, 2013, and 2012. Compensation expense is based on the grant date fair value. The awards vest annually over a three-year or four-year period and have a contractual term of seven years. The Company estimates the fair value of stock options using the Black-Scholes valuation model. Key inputs and assumptions used to estimate the fair value of stock options include the grant price of the award, the expected option term, volatility of the Company’s stock, the risk-free rate and the Company’s dividend yield. Estimates of fair value are not intended to predict actual future events or the value ultimately realized by employees who receive equity awards, and subsequent events are not indicative of reasonableness of the original estimates of fair value made by the Company.
The fair value of each stock option grant was estimated at the date of grant using a Black-Scholes option pricing model. The following table presents the weighted-average assumptions used in the valuation and the resulting weighted-average fair value per option granted for the years ended December 31, 2014, 2013 and 2012:


Employee stock options:	2014				2013				2012
Volatility	43.3		%		51.7		%		82.4		%
Risk-free interest rate	1.1		%		0.7		%		0.6		%
Dividend yield	—		%		—		%		—		%
Expected life (years)	3.8				3.6				3.8

Weighted average fair value per option	$	3.99			$	3.8			$	5.42

A historical daily measurement of volatility is determined based on the expected life of the option granted. The risk-free interest rate is determined by reference to the yield on an outstanding U.S. Treasury note with a term equal to the expected life of the option granted. Expected life is determined by reference to the Company’s historical experience. The Company determines the dividend yield by dividing the expected annual dividend on the Company’s stock by the option exercise price.
Shareholder Rights Plan On July 27, 2005, the Company’s Board of Directors adopted a shareholder rights plan (the Rights Plan) pursuant to which Entegris declared a dividend on August 8, 2005 to its shareholders of record on that date of one preferred share purchase right (a Right) for each share of Entegris common stock owned on August 8, 2005 and authorized the issuance of Rights in connection with future issuances of Entegris common stock. Each Right entitles the holder to purchase one-hundredth of a share of a series of preferred stock at an exercise price of $50, subject to adjustment as provided in the Rights Plan. The Rights Plan is designed to protect Entegris’ shareholders from attempts by others to acquire Entegris on terms or by using tactics that could deny all shareholders the opportunity to realize the full value of their investment. The Rights are attached to the shares of the Company’s common stock until certain triggering events specified in the Rights Agreement occur, including, unless approved by the Company’s Board of Directors, an acquisition by a person or group of specified levels of beneficial ownership of Entegris common stock or a tender offer for Entegris common stock. Upon the occurrence of any of these triggering events, the Rights authorize the holders to purchase at the then-current exercise price for the Rights, that number of shares of the Company’s common stock having a value equal to twice the exercise price. The Rights are redeemable by the Company for $0.01 and will expire on August 8, 2015. One of the events which will trigger the Rights is the acquisition, or commencement of a tender offer, by a person (an Acquiring Person, as defined in the shareholder rights plan), other than Entegris or any of its subsidiaries or employee benefit plans, of 15% or more of the outstanding shares of the Company’s common stock. An Acquiring Person may not exercise a Right.

Benefit_Plans

Benefit Plans	12 Months Ended
	Dec. 31, 2014
Benefit Plans	BENEFIT PLANS
	401(k) Plan The Company maintains the Entegris, Inc. 401(k) Savings and Profit Sharing Plan (the 401(k) Plan) that qualifies as a deferred salary arrangement under Section 401(k) of the Internal Revenue Code. Under the Plan, eligible employees may defer a portion of their pre-tax wages, up to the Internal Revenue Service annual contribution limit. Entegris matches employees’ contributions to a maximum match of 4% of the employee’s eligible wages. The employer matching contribution expense under the Plan was $4.4 million, $3.2 million and $3.0 million in the fiscal years ended December 31, 2014, 2013 and 2012, respectively.
	Defined Benefit Plans The employees of the Company’s subsidiaries in Japan, Taiwan and Germany are covered in defined benefit pension plans. The Company uses a December 31 measurement date for its pension plans.
	The tables below set forth the Company’s estimated funded status as of December 31, 2014 and 2013:


	(In thousands)	2014				2013
	Change in benefit obligation:
	Benefit obligation at beginning of year	$	9,855			$	12,607

	Service cost	64				98

	Interest cost	111				122

	Actuarial loss (gain)	336				(158		)

	Benefits paid	(922		)		(1,072		)
	Foreign exchange impact	(962		)		(1,742		)
	Benefit obligation at end of year	8,482				9,855

	Change in plan assets:
	Fair value of plan assets at beginning of year	384				382

	Return on plan assets	9				5

	Employer contributions	9				9

	Foreign exchange impact	(22		)		(12		)
	Fair value of plan assets at end of year	380				384

	Funded status:
	Plan assets less than benefit obligation - Net amount recognized	$	(8,102	)		$	(9,471	)
	Amounts recognized in the consolidated balance sheets consist of:


	(In thousands)	2014				2013
	Noncurrent liability	$	(8,102	)		$	(9,471	)
	Accumulated other comprehensive loss, net of taxes	1,007				857

	Amounts recognized in accumulated other comprehensive loss, net of tax consist of:


	(In thousands)	2014				2013
	Net actuarial loss	$	1,043			$	811

	Prior service cost	227				259

	Unrecognized transition obligation	(9		)		(11		)
	Gross amount recognized	1,261				1,059

	Deferred income taxes	(254		)		(202		)
	Net amount recognized	$	1,007			$	857

	Information for pension plans with an accumulated benefit obligation in excess of plan assets:


	(In thousands)	2014				2013
	Projected benefit obligation	$	8,482			$	9,855

	Accumulated benefit obligation	7,180				8,651

	Fair value of plan assets	380				384

	The components of the net periodic benefit cost for the years ended December 31, 2014, 2013 and 2012 were as follows:


(In thousands)	2014				2013				2012
Pension benefits:
Service cost	$	64			$	98			$	89

Interest cost	111				122				163

Expected return on plan assets	(8		)		(7		)		(7		)
Amortization of prior service cost	18				19				19

Amortization of net transition obligation	(1		)		(1		)		(1		)
Amortization of plan loss	22				219				20

Recognized actuarial net loss	7				8				1

Acquisition	—				—				—

Curtailments	—				—				—

Net periodic pension benefit cost	$	213			$	458			$	284

The estimated amount that will be amortized from accumulated other comprehensive income into net periodic benefit cost in 2015 is as follows:


(In thousands)
Transition obligation	$	(1	)
Prior service cost	17

Net actuarial loss	44

	$	60

Assumptions used in determining the benefit obligation and net periodic benefit cost for the Company’s pension plans for the years ended December 31, 2014, 2013 and 2012 are presented in the following table as weighted-averages:


	2014			2013			2012
Benefit obligations:
Discount rate	1.13	%		1.23	%		1.19	%
Rate of compensation increase	4.41	%		4.1	%		4.18	%
Net periodic benefit cost:
Discount rate	1.83	%		1.41	%		1.8	%
Rate of compensation increase	3.38	%		2.01	%		2.84	%
Expected return on plan assets	1.35	%		0.7	%		1.14	%
The plans’ expected return on assets as shown above is based on management’s expectations of long-term average rates of return to be achieved by the underlying investment portfolios. In establishing this assumption, management considers historical and expected returns for the asset classes in which the plans are invested, as well as current economic and capital market conditions. The discount rate primarily used by the Company is based on market yields at the valuation date on government bonds as well as the estimated maturity of benefit payments.
Plan Assets
At December 31, 2014 and 2013, the Company’s pension plan assets are deposited in Bank of Taiwan in the form of money market funds, where the Bank of Taiwan is the assigned funding vehicle for the statutory retirement benefit.
The fair value measurements of the Company’s pension plan assets at December 31, 2014, by asset category are as follows:


(In thousands)					Quoted prices				Significant			Significant
					in active				observable			unobservable
					markets for				inputs			inputs
					identical
					assets
Asset category	Total				(Level 1)				(Level 2)			(Level 3)
Taiwan plan assets (a)	$	380			$	380			—			—

	$	380			$	380			—			—


(a)	This category includes investments in the government of Taiwan’s pension fund. The government of Taiwan is responsible for the strategy and allocation of the investment contributions.
The fair value measurements of the Company’s pension plan assets at December 31, 2013, by asset category are as follows:


(In thousands)					Quoted prices				Significant			Significant
					in active				observable			unobservable
					markets for				inputs			inputs
					identical
					assets
Asset category	Total				(Level 1)				(Level 2)			(Level 3)
Taiwan plan assets (a)	$	384			$	384			—			—

	$	384			$	384			—			—


(a)	This category includes investments in the government of Taiwan’s pension fund. The government of Taiwan is responsible for the strategy and allocation of the investment contributions.
Cash Flows
The Company expects to make the following contributions and benefit payments:


(In thousands)	Contributions				Payments
2015	$	9			$	195

2016	—				129

2017	—				239

2018	—				264

2019	—				216

Years 2019-2023	—				2,297

Fair_Value_Measurements

Fair Value Measurements	12 Months Ended
	Dec. 31, 2014
Fair Value Measurements	FAIR VALUE MEASUREMENTS
	Generally accepted accounting principles establish a fair value hierarchy that prioritizes the inputs used to measure fair value. The three levels of the fair value hierarchy are as follows:
	Level 1—Quoted prices in active markets accessible at the reporting date for identical assets and liabilities.
	Level 2—Quoted prices for similar assets or liabilities in active markets. Quoted prices for identical or similar assets and liabilities in markets that are not considered active or financial instruments for which all significant inputs are observable, either directly or indirectly.
	Level 3—Prices or valuations that require inputs that are significant to the valuation and are unobservable.
	A financial instrument’s level within the fair value hierarchy is based on the lowest level of any input that is significant to the fair value measurement.
	Financial Assets Measured at Fair Value on a Recurring Basis
	The following table presents the Company’s financial assets and liabilities that are measured at fair value on a recurring basis at December 31, 2014 and 2013.



		31-Dec-14											31-Dec-13
	(In thousands)	Level 1			Level 2			Level 3			Total		Level 1		Level 2		Level 3		Total
	Assets:
	Cash equivalents
	Commercial paper	$	—		$	—		$	—		$	—	$	—	$	49,988	$	—	$	49,988

	Money market fund deposits	—			—			—			—		118,090		—		—		118,090

	Short-term investments
	Common stock	4,601			—			—			4,601		—		—		—		—

	Total assets measured and recorded at fair value	$	4,601		$	—		$	—		$	4,601	$	118,090	$	49,988	$	—	$	168,078

	Liabilities:
	Foreign exchange forward contracts	$	—		$	1,851		$	—		$	1,851	$	—	$	514	$	—	$	514

	Contingent consideration	$	—		$	—		$	—		$	—	$	—	$	—	$	1,282	$	1,282

	Total liabilities measured and recorded at fair value	$	—		$	1,851		$	—		$	1,851	$	—	$	514	$	1,282	$	1,796


	The following table provides information about derivative positions held by the Company as of December 31, 2014 and 2013:


		31-Dec-14					31-Dec-13
	(In thousands)	Gross		Gross	Net amount		Gross	Gross		Net amount of
		amounts of		amounts	of liabilities		amounts	amounts		liabilities in the
		recognized		offset in the	in the		of	offset in the		consolidated
		liabilities		consolidated	consolidated		recognized	consolidated		balance sheet
				balance	balance		liabilities	balance
				sheet	sheet			sheet
	Foreign exchange forward contracts	$4,336		$2,485	$1,851		$620	$106		$514
	Gains and losses associated with derivatives are recorded in other expense (income), net, in the consolidated statements of operations. Losses associated with derivative instruments not designated as hedging instruments for the years ended December 31, 2014 and 2013 were as follows:


	(In thousands)	2014		2013
	Losses on foreign currency forward contracts	$1,456		$5,726
	Items Measured at Fair Value on a Nonrecurring Basis

	In the fourth quarter of 2014, the Company recorded a gain of $0.3 million on the sale of an equity investment that was classified within other expense (income), net in the consolidated statements of operations. The carrying value of the investment at the time of the sale was $2.3 million. The Company received cash proceeds of $2.6 million resulting in the aforementioned gain.

	In the fourth quarter of 2014, the Company recorded an other-than-temporary impairment of $1.9 million related to an available-for-sale common stock investment classified in short-term investments in the consolidated balance sheet. The fair value of the investment after impairment was $4.6 million at December 31, 2014 and is classified as a Level 1 investment in the fair value hierarchy. The fair value measurement of the common stock investment was based on a quoted market price in an active market. The Company determined that it was an other-than-temporary impairment due to the significant decline in fair value compared to the acquisition cost for an extended period of time and the financial condition of the issuer.

Earning_Per_Share_EPS

Earning Per Share (EPS)	12 Months Ended
	Dec. 31, 2014
Earning Per Share (EPS)	EARNINGS PER SHARE (EPS)
	Basic EPS is computed by dividing net income attributable to Entegris, Inc. by the weighted average number of shares of common stock outstanding during each period. The following table presents a reconciliation of the share amounts used in the computation of basic and diluted earnings per share:


	(In thousands)	2014	2013	2012
	Basic earnings per share—Weighted common shares outstanding	139,311	138,950	137,306

	Weighted common shares assumed upon exercise of options and vesting of restricted stock units	751	668	1,106

	Diluted earnings per share—Weighted common shares outstanding	140,062	139,618	138,412

	The Company excluded the following shares underlying stock-based awards from the calculations of diluted EPS because their inclusion would have been anti-dilutive for the years ended December 31, 2014, 2013 and 2012:


	(In thousands)	2014	2013	2012
	Shares excluded from calculations of diluted EPS	1,183	1,248	1,431

Segment_Information

Segment Information	12 Months Ended
	Dec. 31, 2014
Segment Information	SEGMENT INFORMATION

	In 2014 the Company changed its financial segment reporting to reflect management and organizational changes made by the Company. Under the new structure, the manager of two primary segments is accountable for results at the segment profit level and reports directly to the Company’s Chief Executive Officer, who is responsible for evaluating companywide performance and resource allocation decisions between the segments, and is the chief operating decision maker. Accordingly, the Company will report its financial performance based on two reportable segments: Critical Materials Handling (CMH) and Electronic Materials (EM). The Company's two reportable segments are business divisions that provide unique products and services.

	•	CMH: provides a broad range of products that filter, handle, dispense, and protect critical materials used in the semiconductor manufacturing process and in other high-technology manufacturing. CMH’s products and subsystems include high-purity materials packaging, fluid handling and dispensing systems and liquid filters as well as microenvironment products that protect critical substrates such as wafers during shipping and manufacturing. CMH also provides specialized graphite components and specialty coatings for high-temperature applications.

	•	EM: provides high performance materials, materials packaging and materials delivery systems that enable high yield, cost effective semiconductor manufacturing. EM’s products consist of specialized chemistries and performance materials, gas microcontamination control systems and components, and sub-atmospheric pressure gas delivery systems for the safe and efficient handling of hazardous gases to semiconductor process equipment.
	Inter-segment sales are not significant. Segment profit is defined as net sales less direct segment operating expenses, excluding certain unallocated expenses, consisting mainly of general and administrative costs for the Company’s human resources, finance and information technology functions as well as interest expense, amortization of intangible assets, charges for the fair value write-up of acquired inventory sold, contingent consideration fair value adjustments, income taxes and equity in net income of affiliates.
	Corporate assets consist primarily of cash and cash equivalents, short-term investments, assets held for sale, investments, deferred tax assets and deferred tax charges.
	Summarized financial information for the Company’s reportable segments is shown in the following tables.


	(In thousands)	2014			2013			2012
	Net sales:
	CMH	$	653,964		$	609,826		$	630,929

	EM	308,105			83,633			84,974

	Total net sales	$	962,069		$	693,459		$	715,903

	(In thousands)	2014			2013			2012
	Segment profit:
	CMH	$	138,379		$	128,910		$	144,758

	EM	90,121			20,034			21,051

	Total segment profit	$	228,500		$	148,944		$	165,809

	(In thousands)	2014			2013			2012
	Total assets:
	CMH	$	500,575		$	395,291		$	362,672

	EM	804,889			46,831			41,348

	Corporate	456,627			433,172			407,524

	Total assets	$	1,762,091		$	875,294		$	811,544



	(In thousands)	2014			2013			2012
	Depreciation and amortization:
	CMH	$	37,455		$	32,797		$	31,612

	EM	41,671			4,238			4,358

	Corporate	4,578			1,780			1,637

	Total depreciation and amortization	$	83,704		$	38,815		$	37,607

	(In thousands)	2014			2013			2012
	Capital expenditures:
	CMH	$	33,619		$	49,893		$	40,683

	EM	19,450			6,842			5,579

	Corporate	4,664			3,625			3,667

	Total capital expenditures	$	57,733		$	60,360		$	49,929


	The following table reconciles total segment profit to income before income taxes and equity in net loss (income) of affiliates:


(In thousands)	2014			2013			2012
Total segment profit	$	228,500		$	148,944		$	165,809

Less:
Charge for fair value write-up of acquired inventory sold	48,586			—			—

Amortization of intangibles	37,067			9,347			9,594

Contingent consideration fair value adjustment	(1,282		)	(1,813		)	—

Unallocated general and administrative expenses	122,775			47,173			56,771

Operating income	21,354			94,237			99,444

Interest expense	33,355			153			271

Interest income	(1,336		)	(317		)	(281		)
Other expense (income), net	2,727			(1,794		)	(249		)

(Loss) income before income tax (benefit) expense and equity in net loss (income) of affiliates	$	(13,392	)	$	96,195		$	99,703


The following table presents amortization of intangibles for each of the Company’s segments for the years ended December 31, 2014, 2013 and 2012:


(In thousands)	2014			2013			2012
Amortization of intangibles:
CMH	$	10,180		$	8,620		$	8,772

EM	26,887			727			822

	$	37,067		$	9,347		$	9,594


The following table summarizes total net sales, based upon the country to which sales to external customers were made for the years ended December 31, 2014, 2013 and 2012:


(In thousands)	2014			2013			2012
Net sales:
United States	$	239,040		$	201,380		$	218,903

Japan	121,452			101,529			131,521

Germany	27,867			23,240			24,437

Taiwan	230,824			128,194			126,732

Singapore	46,051			30,942			25,607

South Korea	122,328			76,353			70,763

China	66,186			36,299			31,499

Other	108,321			95,522			86,441

	$	962,069		$	693,459		$	715,903


The following table summarizes property, plant and equipment, net, attributed to significant countries for the years ended December 31, 2014, 2013 and 2012:


(In thousands)	2014			2013			2012
Property, plant and equipment:
United States	$	222,125		$	123,846		$	86,476

Korea	32,163			4,422			4,946

Japan	22,261			24,007			27,024

Malaysia	20,607			23,801			28,398

Other	16,413			10,364			10,177

	$	313,569		$	186,440		$	157,021


In the year ended December 31, 2014, one individual customer accounted for 13.6% of net sales, which includes sales from both of the Company's segments. In the years ended December 31, 2013 and 2012, no single customer accounted for ten percent or more of net sales.

Commitments_and_Contingent_Lia

Commitments and Contingent Liabilities	12 Months Ended
	Dec. 31, 2014
Commitments and Contingent Liabilities	COMMITMENTS AND CONTINGENT LIABILITIES
	The Company is subject to various claims, legal actions, and complaints arising in the ordinary course of business. The Company believes the final outcome of these matters will not have a material adverse effect on its consolidated financial statements. The Company expenses legal costs as incurred.

Quarterly_InformationUnaudited

Quarterly Information-Unaudited	12 Months Ended
	Dec. 31, 2014
Quarterly Information-Unaudited	QUARTERLY INFORMATION-UNAUDITED


		Fiscal quarter ended
	(In thousands, except per share data)	March 29, 2014		June 28, 2014			September 27, 2014			December 31, 2014
	Net sales	$	165,804	$	251,578		$	273,054		$	271,633

	Gross profit	71,352		88,668			98,743			117,920

	Net income	14,312		(14,669		)	(1,068		)	9,312

	Basic income per share	0.1		(0.11		)	(0.01		)	0.07

	Diluted income per share	0.1		(0.11		)	(0.01		)	0.07



		Fiscal quarter ended
	(In thousands, except per share data)	March 30, 2013		June 29, 2013			September 28, 2013			December 31, 2013
	Net sales	$	165,070	$	177,544		$	164,585		$	186,260

	Gross profit	67,128		77,570			70,132			79,384

	Net income	16,397		19,781			17,807			20,541

	Basic income per share	0.12		0.14			0.13			0.15

	Diluted income per share	0.12		0.14			0.13			0.15

Summary_of_Significant_Account1

Summary of Significant Accounting Policies (Policies)	12 Months Ended
Summary of Significant Accounting Policies (Policies)	Dec. 31, 2014
Nature of Operations	Nature of Operations Entegris, Inc. (Entegris or the Company) is a leading provider of yield-enhancing materials and solutions for advanced manufacturing processes in the semiconductor and other high-technology industries.
Principles of Consolidation	Principles of Consolidation The consolidated financial statements include the accounts of the Company and its majority-owned subsidiaries. Intercompany profits, transactions and balances have been eliminated in consolidation.
Use of Estimates	Use of Estimates and Basis of Presentation The preparation of consolidated financial statements in conformity with accounting principles generally accepted in the United States requires management to make judgments, estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. On an ongoing basis, Entegris evaluates its estimates, including those related to receivables, inventories, property, plant and equipment, intangible assets, accrued liabilities, income taxes and share-based compensation, among others. Actual results could differ from those estimates.
Concentrations of Suppliers	Concentrations of Suppliers Certain materials included in the Company’s products are obtained from a single source or a limited group of suppliers. Although the Company seeks to reduce dependence on those sole and limited source suppliers, the partial or complete loss of these sources could have at least a temporary adverse effect on the Company’s results of operations. Furthermore, a significant increase in the price of one or more of these components could adversely affect the Company’s results of operations.
Cash and Cash Equivalents	Cash and Cash Equivalents Cash and cash equivalents include cash on hand and highly liquid debt securities with original maturities of three months or less, which are valued at cost and approximates fair value.
Allowance For Doubtful Accounts	Allowance for Doubtful Accounts An allowance for uncollectible trade receivables is estimated based on a combination of write-off history, aging analysis and any specific, known troubled accounts. The Company maintains an allowance for doubtful accounts that management believes is adequate to cover expected losses on trade receivables.
Inventories	Inventories Inventories are stated at the lower of cost or market. Cost is determined by the first-in, first-out (FIFO) method.
Property, Plant, And Equipment	Property, Plant, and Equipment Property, plant and equipment are carried at cost and are depreciated on the straight-line method over the estimated useful lives of the assets. When assets are retired or disposed of, the cost and related accumulated depreciation are removed from the accounts, and gains or losses are recognized in the same period. Maintenance and repairs are expensed as incurred; with significant additions and improvements are capitalized. Long-lived assets, including property, plant and equipment, are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset or group of asset(s) may not be recoverable based on estimated future undiscounted cash flows. The amount of impairment, if any, is measured as the difference between the net book value and the estimated fair value of the asset(s).
Investments	Investments The Company’s nonmarketable investments are accounted for under either the cost or equity method of accounting, as appropriate. All nonmarketable investments are periodically reviewed to determine whether declines, if any, in fair value below cost basis are other-than-temporary. If the decline in fair value is determined to be other-than-temporary, an impairment loss is recorded and the investment is written down to a new cost basis.
Fair Value of Financial Instruments	Fair Value of Financial Instruments The carrying value of cash equivalents, accounts receivable, accounts payable, accrued payroll and related benefits, and other accrued liabilities approximates fair value due to the short maturity of those instruments.
Goodwill and Intangible Assets	Intangible Assets Goodwill represents the excess of acquisition costs over the fair value of the net assets of businesses acquired. Goodwill is not amortized, but instead tested at least annually for impairment. Goodwill is also tested for impairment as changes in circumstances occur indicating that the carrying value may not be recoverable. At August 31, 2014, the Company's annual testing date, it was determined there was no impairment of its goodwill.
Goodwill and Intangible Assets	Amortizable intangible assets include, among other items, patented, unpatented and other developed technology and customer-based intangibles, and are amortized using the straight-line method over their respective estimated useful lives of 3 to 15 years. The Company reviews intangible assets, along with other long-lived assets - primarily property, plant and equipment - for impairment if changes in circumstances or the occurrence of events suggest the remaining value may not be recoverable.
Derivative Financial Instruments	Derivative Financial Instruments The Company records derivatives as assets or liabilities on the balance sheet and measures such instruments at fair value. Changes in fair value of derivatives are recorded each period in the Company’s consolidated statements of operations.
Derivative Financial Instruments	The Company periodically enters into forward foreign currency contracts to reduce exposures relating to rate changes in certain foreign currencies. Certain exposures to credit losses related to counterparty nonperformance exist. However, the Company does not anticipate nonperformance by the counterparties since they are large, well-established financial institutions. None of these derivatives is accounted for as a hedge transaction. Accordingly, changes in the fair value of forward foreign currency contracts are recorded as other expense (income), net, in the Company’s consolidated statements of operations. The fair values of the Company’s derivative financial instruments are based on prices quoted by financial institutions for these instruments.
Foreign Currency Translation	Foreign Currency Translation Assets and liabilities of foreign subsidiaries are generally translated from foreign currencies into U.S. dollars at period-end exchange rates, and the resulting gains and losses arising from translation of net assets located outside the U.S. are recorded as a cumulative translation adjustment, a component of accumulated other comprehensive income in the consolidated balance sheets. Income statement amounts are translated at the weighted average exchange rates for the year. Translation adjustments are not adjusted for income taxes, as substantially all translation adjustments relate to permanent investments in non-U.S. subsidiaries. Gains and losses resulting from foreign currency transactions are included in other expense (income), net, in the Company's consolidated statements of operations.
Revenue Recognition	Revenue Recognition Revenue and the related cost of sales are generally recognized upon shipment of the products. Revenue for product sales is recognized upon delivery, when persuasive evidence of an arrangement exists, when title and risk of loss have been transferred to the customer, collectability is reasonably assured, and pricing is fixed or determinable. Shipping and handling fees related to sales transactions are billed to customers and are recorded as revenue.
	The Company sells its products throughout the world primarily to companies in the microelectronics industry. The Company performs continuing credit evaluations of its customers and generally does not require collateral. Letters of credit may be required from its customers in certain circumstances. The Company provides for estimated returns based on historical and current trends in both sales and product returns.
	The Company collects various sales and value-added taxes on certain product and service sales that are accounted for on a net basis.
Shipping and Handling Costs	Shipping and Handling Costs Shipping and handling costs incurred are recorded in cost of sales in the Company's consolidated statements of operations.
Engineering,Research and Development Expenses	Engineering, Research and Development Expenses Engineering, research and development costs are expensed as incurred.
Share-Based Compensation	Share-based Compensation The Company measures the cost of employee services received in exchange for the award of equity instruments based on the fair value of the award at the date of grant. The cost is recognized over the period during which an employee is required to provide services in exchange for the award. Compensation expense is based on the grant date fair value. Because share-based compensation expense recognized in the Company's consolidated statements of operations is based on awards ultimately expected to vest, it has been reduced for expected forfeitures, which are estimated at the time of grant with such estimates revised, if necessary, in subsequent periods if actual forfeitures differ from those estimates.
Income Taxes	Income Taxes The Company accounts for income taxes under the asset and liability method, which requires the recognition of deferred tax assets and liabilities for the expected future tax consequences of events that have been included in the financial statements. Under this method, deferred tax assets and liabilities are determined on the basis of the differences between the financial statements and tax basis of assets and liabilities using enacted tax rates in effect for the year in which the differences are expected to reverse. The effect of a change in tax rates on deferred tax assets and liabilities is recognized in income tax expense in the period that includes the enactment date.
	The Company recognizes deferred tax assets to the extent that it believes these assets are more likely than not to be realized. A valuation allowance is recorded to reduce deferred tax assets when it is more likely than not that the Company would not be able to realize all or part of its deferred tax assets. In making such a determination, the Company considers all available positive and negative evidence, including future reversals of existing temporary differences, projected future taxable income, tax-planning strategies, and results of recent operations. If the Company determines that it would be able to realize its deferred tax assets in the future in excess of their net recorded amount, the Company would make an adjustment to the deferred tax asset valuation allowance, which would reduce the provision for income taxes.
	The Company’s policy for recording interest and penalties associated with audits and unrecognized tax benefits is to record such items as a component of income before taxes. Penalties and interest to be paid or received are recorded in other expense (income), net, in the statement of operations.
Comprehensive (Loss) Income	Comprehensive (Loss) Income Comprehensive income represents the change in equity resulting from items other than shareholder investments and distributions. The Company’s foreign currency translation adjustments, unrealized gains and losses on available-for-sale investments, and minimum pension liability adjustments are included in accumulated other comprehensive income. Comprehensive income and the components of accumulated other comprehensive income are presented in the accompanying consolidated statements of equity and comprehensive (loss) income.
Recent Accounting Pronouncements	Recent Accounting Pronouncements
Recent Accounting Pronouncements	Accounting Standards Updates issued but not effective for the Company until after December 31, 2014 are not expected to have a material effect on the Company’s consolidated financial statements.

Acquisitions_Tables

Acquisitions (Tables)	12 Months Ended
	Dec. 31, 2014
Acquisitions [Abstract]
Schedule of Acquisition Purchase Price [Table Text Block]	The purchase price of Jetalon consisted of the following:


	(In thousands):
	Cash paid at closing	$	13,358

	Contingent consideration obligation	3,094

	Total purchase price	$	16,452

	The purchase price of ATMI consisted of the following:


	(In thousands):
	Cash paid to ATMI shareholders	$	1,099,033

	Cash paid in settlement of share-based compensation awards	31,451

	Total purchase price	1,130,484

	Less cash and cash equivalents acquired	321,094

	Total purchase price, net of cash acquired	$	809,390

Schedule of Business Acquisitions, by Acquisition [Table Text Block]	The following table summarizes the allocation of the purchase price to the fair values assigned to the assets acquired and liabilities assumed at the date of the Jetalon acquisition:


	(In thousands):
	Accounts receivable, inventory and other assets		$	944

	Identifiable intangible assets		5,634

	Current liabilities		(216		)
	Net assets acquired		6,362

	Goodwill		10,090

	Total purchase price		$	16,452

	The following table summarizes the allocation of the purchase price to the fair values assigned to the assets acquired and liabilities assumed at the date of the ATMI acquisition:


	(In thousands):
	Accounts receivable and other current assets	$	107,967

	Inventory	115,507

	Property, plant and equipment	126,302

	Identifiable intangible assets	297,040

	Other noncurrent assets	13,216

	Current liabilities	(60,056		)
	Deferred tax liabilities and other noncurrent liabilities	(122,710		)
	Net assets acquired	477,266

	Goodwill	332,124

	Total purchase price, net of cash acquired	$	809,390

Acquisition, Pro Forma Information [Table Text Block]	The following unaudited pro forma financial information presents the combined results of operations of the Company as if the acquisition of ATMI had occurred as of the beginning of the years presented. The unaudited pro forma financial information is not necessarily indicative of what the Company’s consolidated results of operations actually would have been had the acquisition occurred at the beginning of each year. In addition, the unaudited pro forma financial information does not attempt to project the future results of operations of the combined company.


		Year ended
	(In thousands, except per share data) (Unaudited)	31-Dec-14			31-Dec-13
	Net sales	$	1,076,334		$	1,051,175

	Net income	68,279			60,324

	Per share amounts:
	Net income per common share - basic	$	0.49		$	0.43

	Net income per common share - diluted	0.49			0.43

Trade_Accounts_and_Notes_Recei1

Trade Accounts and Notes Receivable (Tables)	12 Months Ended
	Dec. 31, 2014
Trade Accounts and Notes Receivable	Trade accounts and notes receivable from customers at December 31, 2014 and 2013 consist of the following:


	(In thousands)	2014		2013
	Accounts receivable	$	151,082	$	94,613

	Notes receivable	4,706		9,039

		155,788		103,652

	Less allowance for doubtful accounts	1,827		1,779

		$	153,961	$	101,873

Inventories_Tables

Inventories (Tables)	12 Months Ended
	Dec. 31, 2014
Inventories	Inventories at December 31, 2014 and 2013 consist of the following:


	(In thousands)	2014		2013
	Raw materials	$	41,015	$	26,012

	Work-in-process	14,190		10,512

	Finished goods (a)	107,431		56,998

	Supplies	489		552

		$	163,125	$	94,074


	(a)	Includes consignment inventories held by customers for $11.0 million and $5.1 million at December 31, 2014 and 2013,

Property_Plant_and_Equipment_T

Property, Plant and Equipment (Tables)	12 Months Ended
	Dec. 31, 2014
Property, Plant and Equipment	Property, plant, and equipment at December 31, 2014 and 2013 consists of the following:


	(In thousands)	2014		2013		Estimated
						useful lives in
						years
	Land	$	15,064	$	12,866

	Buildings and improvements	150,450		109,105		May-35

	Manufacturing equipment	214,509		168,197		10-May

	Canisters and cylinders	42,154		—		12-Mar

	Molds	80,532		76,909		5-Mar

	Office furniture and equipment	99,624		70,158		8-Mar

	Construction in progress	27,185		33,021

		629,518		470,256

	Less accumulated depreciation	315,949		283,816

		$	313,569	$	186,440

Depreciation Expense	The table below sets forth the depreciation expense for the years ended December 31, 2014, 2013, and 2012:


	(In thousands)	2014		2013		2012
	Depreciation expense	$	46,637	$	29,468	$	28,013

Intangible_Assets_Tables

Intangible Assets (Tables)	12 Months Ended
	Dec. 31, 2014
Schedule of Goodwill [Table Text Block]	Goodwill activity for each of the Company's two reportable segments, Critical Materials Handling (CMH) and Electronic Materials (EM), was as follows:


	(In thousands)	CMH			EM			Total
	31-Dec-12	$	2,209		$	—		$	2,209

	Addition due to acquisition	10,090			—			10,090

	Other, including foreign currency translation	(25		)	—			(25		)

	31-Dec-13	12,274			—			12,274

	Addition due to acquisition	35,329			296,795			332,124

	Other, including foreign currency translation	(120		)	(3,535		)	(3,655		)
	31-Dec-14	$	47,483		$	293,260		$	340,743

Schedule of Acquired Finite-Lived Intangible Assets by Major Class [Table Text Block]	ntangible assets at December 31, 2014 and 2013 consist of the following:


	2014
	(In thousands)	Gross carrying			Accumulated			Net carrying			Weighted
		Amount			amortization			value			average life in
											years
	Patents	$	1,347		$	779		$	568		9.8

	Developed technology	199,402			78,785			120,617			6.6

	Trademarks and trade names	17,152			8,883			8,269			9.8

	Customer relationships	220,420			54,452			165,968			10.3

	Other	16,768			3,636			13,132			6.6

		$	455,089		$	146,535		$	308,554		8.5



	2013
	(In thousands)	Gross carrying			Accumulated			Net carrying			Weighted
		amount			amortization			value			average life in
											years
	Patents	$	1,369		$	649		$	720		9.8

	Developed technology	78,686			62,257			16,429			7.4

	Trademarks and trade names	13,092			7,306			5,786			12

	Customer relationships	57,617			39,146			18,471			11

	Other	2,213			110			2,103			13.3

		$	152,977		$	109,468		$	43,509		9.3

Estimated Future Amortization Expense	The amortization expense for each of the five succeeding years and thereafter relating to intangible assets currently recorded in the Company's consolidated balance sheets is estimated to be the following at December 31, 2014:



	Fiscal year ending December 31	(In thousands)
	2015	$	47,835

	2016	45,401

	2017	43,977

	2018	42,725

	2019	40,472

	Thereafter	88,144

		$	308,554

Schedule Of Amortization Of Intangibles Table [Text Block]	The table below sets forth the amortization expense for the years ended December 31, 2014, 2013, and 2012:


	(In thousands)	2014			2013			2012
	Amortization expense	$	37,067		$	9,347		$	9,594

	The following table presents amortization of intangibles for each of the Company’s segments for the years ended December 31, 2014, 2013 and 2012:


	(In thousands)	2014			2013			2012
	Amortization of intangibles:
	CMH	$	10,180		$	8,620		$	8,772

	EM	26,887			727			822

		$	37,067		$	9,347		$	9,594

Debt_Tables

Debt (Tables)	12 Months Ended
	Dec. 31, 2014
Debt [Abstract]
Schedule of Debt [Table Text Block]	Long-term debt at December 31, 2014 consists of the following:


	(In thousands)	31-Dec-14
	Senior secured term loan facility due 2021	$	406,796

	Senior unsecured notes due 2022	360,000

	Total long-term debt	766,796

	Less current maturities of long-term debt	100,000

	Long-term debt less current maturities	$	666,796

Schedule of Maturities of Long-term Debt [Table Text Block]	Annual maturities of long-term debt contractually due as of December 31, 2014 are as follows:


	Fiscal year ending	(In thousands)
	2015	$	26,597

	2016	—

	2017	—

	2018	—

	2019	—

	Thereafter	740,199

		$	766,796

Lease_Commitments_Tables

Lease Commitments (Tables)	12 Months Ended
	Dec. 31, 2014
Future Minimum Lease Payments	As of December 31, 2014, the Company was obligated under noncancellable operating lease agreements for certain sales offices and manufacturing facilities, manufacturing equipment, vehicles, information technology equipment and warehouse space. Future minimum lease payments for noncancellable operating leases with initial or remaining terms in excess of one year are as follows:



	Fiscal year ending December 31	(In thousands)
	2015	$	10,708

	2016	6,810

	2017	4,596

	2018	3,738

	2019	948

	Thereafter	292

	Total minimum lease payments	$	27,092

Asset_Retirement_Obligations_T

Asset Retirement Obligations (Tables)	12 Months Ended
	Dec. 31, 2014
Asset Retirement Obligation [Abstract]
Schedule of Asset Retirement Obligations [Table Text Block]	Changes in the carrying amounts of the Company’s AROs at December 31, 2014 are shown below:


	(In thousands)

	Balance at December 31, 2013	$	2,167

	Liabilities assumed in ATMI acquisition	7,365

	Liabilities settled	(128		)
	Liabilities incurred	248

	Accretion expense	195

	Revision of estimate	103

	Balance at December 31, 2014	$	9,950

Income_Taxes_Tables

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2014
Income (Loss) Before Income Taxes	ncome before income taxes for the years ended December 31, 2014, 2013 and 2012 was derived from the following sources:


	(In thousands)	2014			2013			2012
	Domestic	$	(118,917	)	$	29,066		$	49,056

	Foreign	105,525			67,129			50,647

	(Loss) income before income tax (benefit) expense and equity in net loss (income of affiliates	$	(13,392	)	$	96,195		$	99,703

Components of Income Tax (Benefit) Expense	Income tax (benefit) expense for the years ended December 31, 2014, 2013, and 2012 is summarized as follows:


	(In thousands)	2014			2013			2012
	Current:
	Federal	$	1,574		$	854		$	5,797

	State	111			772			654

	Foreign	21,459			12,937			11,183

		23,144			14,563			17,634

	Deferred (net of valuation allowance):
	Federal	(41,484		)	6,003			11,165

	State	(1,545		)	(650		)	168

	Foreign	(1,687		)	1,753			1,914

		(44,716		)	7,106			13,247

	Income tax (benefit) expense	$	(21,572	)	$	21,669		$	30,881

Reconciliation of Income Tax Expense With Expected Amounts Based Upon Statutory Federal Tax Rates	Income tax (benefit) expense differs from the expected amounts based upon the statutory federal tax rates for the years ended December 31, 2014, 2013, and 2012 as follows:


	(In thousands)	2014			2013			2012
	Expected federal income tax at statutory rate	$	(4,687	)	$	33,668		$	34,896

	State income taxes before valuation allowance, net of federal tax effect	(2,115		)	(357		)	440

	Income (losses) without tax expense (benefit)	(72		)	22			(40		)

	Effect of foreign source income	(19,996		)	(10,583		)	(5,314		)
	Tax contingencies	1,379			1,383			1,374

	Valuation allowance	2,106			445			358

	Non-deductible acquisition costs	2,176			—			—

	U.S. federal research credit	(2,085		)	(3,233		)	(790		)
	Other items, net	1,722			324			(43		)

	Income tax (benefit) expense	$	(21,572	)	$	21,669		$	30,881

Deferred Tax Assets And Deferred Tax Liabilities	The significant components of the Company’s deferred tax assets and deferred tax liabilities at December 31, 2014 and 2013 are as follows:


	(In thousands)	2014			2013
	Deferred tax assets attributable to:
	Accounts receivable	$	243		$	269

	Inventory	5,663			2,853

	Accruals not currently deductible for tax purposes	9,915			8,844

	Net operating loss and credit carryforwards	12,183			3,972

	Capital loss carryforward	3,088			2,779

	Depreciation	10,498			1,070

	Equity compensation	3,662			3,157

	Asset impairments	732			732

	Purchased intangible assets	—			1,439

	Other, net	5,549			2,976

	Gross deferred tax assets	51,533			28,091

	Valuation allowance	(11,104		)	(5,435		)
	Total deferred tax assets	40,429			22,656

	Deferred tax liabilities attributable to:
	Depreciation	—			(3,245		)

	Purchased intangible assets	(77,149		)	(601		)
	Total deferred tax liabilities	(77,149		)	(3,846		)
	Net deferred tax (liabilities) assets	$	(36,720	)	$	18,810

Reconciliations of Total Amount of Gross Unrecognized Tax Benefits	Reconciliations of the beginning and ending balances of the total amounts of gross unrecognized tax benefits for the years ended December 31, 2014 and 2013 are as follows:


	(In thousands)	2014			2013
	Gross unrecognized tax benefits at beginning of year	$	4,277		$	5,419

	Increase from acquisition	2,431			—

	Increases in tax positions for prior years	—			28

	Decreases in tax positions for prior years	(246		)	—

	Increases in tax positions for current year	2,409			1,879

	Settlements	(1,385		)	(2,298		)
	Lapse in statute of limitations	(1,502		)	(751		)
	Gross unrecognized tax benefits at end of year	$	5,984		$	4,277

Equity_Tables

Equity (Tables)	12 Months Ended
	Dec. 31, 2014
Summary of Option Activity	Stock option activity for the 2010 Stock Plan and predecessor plans for the years ended December 31, 2014, 2013 and 2012 is summarized as follows:


		2014							2013							2012
	(Shares in thousands)	Number of			Weighted				Number of			Weighted				Number of		Weighted
		shares			average				shares			average				shares		average
					exercise							exercise						exercise
					price							price						price
	Options outstanding, beginning of year	1,961			$	8.2			2,565			$	8.2			3,561		$	6.53

	Granted	651			11.71				553			9.88				470		9.27

	Exercised	(546	)		6.56				(786	)		7.54				(1,293	)	3.76

	Expired or Forfeited	(32	)		14.06				(371	)		12.1				(173	)	9.83

	Options outstanding, end of year	2,034			$	9.67			1,961			$	8.2			2,565		$	8.2

	Options exercisable, end of year	728			$	7.92			1,001			$	6.92			1,828		$	8.18

Summary of Options Outstanding	Options outstanding for the Company’s stock plans at December 31, 2014 are summarized as follows:


	(Shares in thousands)	Options outstanding									Options exercisable
	Range of exercise prices	Number			Weighted		Weighted-				Number			Weighted
		outstanding			average		average				exercisable			average
					remaining life		exercise							exercise
					in years		price
														price
	$0.00 to $9.40	842			3.0 years		$	7.96			602			$	7.5

	$9.88 to $9.88	541			5.1 years		9.88				126			9.88

	$11.71 to $11.71	651			6.1 years		11.71				—			—

		2,034			4.6 years		9.67				728			7.92

Cash Received From Exercise Of Stock Options and Employee Contribution to ESPP	The table below sets forth the amount of cash received by the Company from the exercise of stock options and employee contributions to the ESPP during the years ended December 31, 2014, 2013 and 2012:


	(In thousands)	2014				2013				2012
	Exercise of stock options and employee contributions to the ESPP	$	3,117			$	7,685			$	7,431

Summary of Restricted Stock Activity	Restricted stock awards are awards of common stock made under the 2010 Stock Plan that are subject to restrictions on transfer and to a risk of forfeiture if the awardee terminates employment with the Company prior to the lapse of the restrictions. The value of such stock is determined using the market price on the grant date. Compensation expense for restricted stock awards is generally recognized using the straight-line single-option method. A summary of the Company’s restricted stock activity for the years ended December 31, 2014, 2013 and 2012 is presented in the following table:


		2014							2013							2012
	(Shares in thousands)	Number			Weighted				Number			Weighted				Number		Weighted
		of			average				of			average				of		average
		shares			grant date				shares			grant date				shares		grant date
					fair value							fair value						fair value
	Unvested, beginning of year	1,570			$	8.98			1,802			$	7.02			2,298		$	5.49

	Granted	834			11.59				717			9.85				744		9.21

	Vested	(686	)		8.32				(871	)		5.67				(1,132	)	5.42

	Forfeited	(105	)		10.14				(78	)		8.66				(108	)	6.22

	Unvested, end of year	1,613			10.53				1,570			8.98				1,802		7.02

Summary of Allocation of Share Based Compensation Expense	The following table summarizes the allocation of share-based compensation expense related to employee stock options, restricted stock awards and grants under the employee stock purchase plan for the years ended December 31, 2014, 2013 and 2012:


	(In thousands)	2014				2013				2012
	Cost of sales	$	809			$	690			$	575

	Engineering, research and development expenses	705				502				500

	Selling, general and administrative expenses	7,373				6,736				8,806

	Share-based compensation expense	8,887				7,928				9,881

	Tax benefit	2,746				2,643				3,686

	Share-based compensation expense, net of tax	$	6,141			$	5,285			$	6,195

Weighted Average Assumptions Used In Valuation And Resulting Weighted Average Fair Value Per Option Granted	The fair value of each stock option grant was estimated at the date of grant using a Black-Scholes option pricing model. The following table presents the weighted-average assumptions used in the valuation and the resulting weighted-average fair value per option granted for the years ended December 31, 2014, 2013 and 2012:


	Employee stock options:	2014				2013				2012
	Volatility	43.3		%		51.7		%		82.4		%
	Risk-free interest rate	1.1		%		0.7		%		0.6		%
	Dividend yield	—		%		—		%		—		%
	Expected life (years)	3.8				3.6				3.8

	Weighted average fair value per option	$	3.99			$	3.8			$	5.42

Benefit_Plans_Tables

Benefit Plans (Tables)	12 Months Ended
	Dec. 31, 2014
Estimated Funded Status	The tables below set forth the Company’s estimated funded status as of December 31, 2014 and 2013:


	(In thousands)	2014				2013
	Change in benefit obligation:
	Benefit obligation at beginning of year	$	9,855			$	12,607

	Service cost	64				98

	Interest cost	111				122

	Actuarial loss (gain)	336				(158		)

	Benefits paid	(922		)		(1,072		)
	Foreign exchange impact	(962		)		(1,742		)
	Benefit obligation at end of year	8,482				9,855

	Change in plan assets:
	Fair value of plan assets at beginning of year	384				382

	Return on plan assets	9				5

	Employer contributions	9				9

	Foreign exchange impact	(22		)		(12		)
	Fair value of plan assets at end of year	380				384

	Funded status:
	Plan assets less than benefit obligation - Net amount recognized	$	(8,102	)		$	(9,471	)
Amounts Recognized in Consolidated Balance Sheet	Amounts recognized in the consolidated balance sheets consist of:


	(In thousands)	2014				2013
	Noncurrent liability	$	(8,102	)		$	(9,471	)
	Accumulated other comprehensive loss, net of taxes	1,007				857

Amounts Recognized in Accumulated Other Comprehensive Loss Net of Tax	Amounts recognized in accumulated other comprehensive loss, net of tax consist of:


	(In thousands)	2014				2013
	Net actuarial loss	$	1,043			$	811

	Prior service cost	227				259

	Unrecognized transition obligation	(9		)		(11		)
	Gross amount recognized	1,261				1,059

	Deferred income taxes	(254		)		(202		)
	Net amount recognized	$	1,007			$	857

Pension Plans Accumulated Benefit Obligation in Excess of Plan Assets	Information for pension plans with an accumulated benefit obligation in excess of plan assets:


	(In thousands)	2014				2013
	Projected benefit obligation	$	8,482			$	9,855

	Accumulated benefit obligation	7,180				8,651

	Fair value of plan assets	380				384

Components of Net Periodic Benefit Cost	The components of the net periodic benefit cost for the years ended December 31, 2014, 2013 and 2012 were as follows:


	(In thousands)	2014				2013				2012
	Pension benefits:
	Service cost	$	64			$	98			$	89

	Interest cost	111				122				163

	Expected return on plan assets	(8		)		(7		)		(7		)
	Amortization of prior service cost	18				19				19

	Amortization of net transition obligation	(1		)		(1		)		(1		)
	Amortization of plan loss	22				219				20

	Recognized actuarial net loss	7				8				1

	Acquisition	—				—				—

	Curtailments	—				—				—

	Net periodic pension benefit cost	$	213			$	458			$	284

Estimated Amount Amortized from Accumulated Other Comprehensive Income Into Net Periodic Benefit Cost	The estimated amount that will be amortized from accumulated other comprehensive income into net periodic benefit cost in 2015 is as follows:


	(In thousands)
	Transition obligation	$	(1	)
	Prior service cost	17

	Net actuarial loss	44

		$	60

Assumptions Used in Determining Benefit Obligation and Net Periodic Benefit Cost for Pension Plans	Assumptions used in determining the benefit obligation and net periodic benefit cost for the Company’s pension plans for the years ended December 31, 2014, 2013 and 2012 are presented in the following table as weighted-averages:


		2014			2013			2012
	Benefit obligations:
	Discount rate	1.13	%		1.23	%		1.19	%
	Rate of compensation increase	4.41	%		4.1	%		4.18	%
	Net periodic benefit cost:
	Discount rate	1.83	%		1.41	%		1.8	%
	Rate of compensation increase	3.38	%		2.01	%		2.84	%
	Expected return on plan assets	1.35	%		0.7	%		1.14	%
Fair Value Measurements of Pension Plan Assets	The fair value measurements of the Company’s pension plan assets at December 31, 2014, by asset category are as follows:


	(In thousands)					Quoted prices				Significant			Significant
						in active				observable			unobservable
						markets for				inputs			inputs
						identical
						assets
	Asset category	Total				(Level 1)				(Level 2)			(Level 3)
	Taiwan plan assets (a)	$	380			$	380			—			—

		$	380			$	380			—			—


	(a)	This category includes investments in the government of Taiwan’s pension fund. The government of Taiwan is responsible for the strategy and allocation of the investment contributions.
	The fair value measurements of the Company’s pension plan assets at December 31, 2013, by asset category are as follows:


	(In thousands)					Quoted prices				Significant			Significant
						in active				observable			unobservable
						markets for				inputs			inputs
						identical
						assets
	Asset category	Total				(Level 1)				(Level 2)			(Level 3)
	Taiwan plan assets (a)	$	384			$	384			—			—

		$	384			$	384			—			—


	(a)	This category includes investments in the government of Taiwan’s pension fund. The government of Taiwan is responsible for the strategy and allocation of the investment contributions.
Expected Contribution And Benefit Payments	The Company expects to make the following contributions and benefit payments:


	(In thousands)	Contributions				Payments
	2015	$	9			$	195

	2016	—				129

	2017	—				239

	2018	—				264

	2019	—				216

	Years 2019-2023	—				2,297

Fair_Value_Measurements_Tables

Fair Value Measurements (Tables)	12 Months Ended
	Dec. 31, 2014
Financial Assets Measured At Fair Value On Recurring Basis	The following table presents the Company’s financial assets and liabilities that are measured at fair value on a recurring basis at December 31, 2014 and 2013.



		31-Dec-14											31-Dec-13
	(In thousands)	Level 1			Level 2			Level 3			Total		Level 1		Level 2		Level 3		Total
	Assets:
	Cash equivalents
	Commercial paper	$	—		$	—		$	—		$	—	$	—	$	49,988	$	—	$	49,988

	Money market fund deposits	—			—			—			—		118,090		—		—		118,090

	Short-term investments
	Common stock	4,601			—			—			4,601		—		—		—		—

	Total assets measured and recorded at fair value	$	4,601		$	—		$	—		$	4,601	$	118,090	$	49,988	$	—	$	168,078

	Liabilities:
	Foreign exchange forward contracts	$	—		$	1,851		$	—		$	1,851	$	—	$	514	$	—	$	514

	Contingent consideration	$	—		$	—		$	—		$	—	$	—	$	—	$	1,282	$	1,282

	Total liabilities measured and recorded at fair value	$	—		$	1,851		$	—		$	1,851	$	—	$	514	$	1,282	$	1,796

Schedule of Derivative Instruments [Table Text Block]	The following table provides information about derivative positions held by the Company as of December 31, 2014 and 2013:


		31-Dec-14					31-Dec-13
	(In thousands)	Gross		Gross	Net amount		Gross	Gross		Net amount of
		amounts of		amounts	of liabilities		amounts	amounts		liabilities in the
		recognized		offset in the	in the		of	offset in the		consolidated
		liabilities		consolidated	consolidated		recognized	consolidated		balance sheet
				balance	balance		liabilities	balance
				sheet	sheet			sheet
	Foreign exchange forward contracts	$4,336		$2,485	$1,851		$620	$106		$514
Derivative Instruments, Gain (Loss) [Table Text Block]	Gains and losses associated with derivatives are recorded in other expense (income), net, in the consolidated statements of operations. Losses associated with derivative instruments not designated as hedging instruments for the years ended December 31, 2014 and 2013 were as follows:


	(In thousands)	2014		2013
	Losses on foreign currency forward contracts	$1,456		$5,726

Earning_Per_Share_EPS_Tables

Earning Per Share (EPS) (Tables)	12 Months Ended
	Dec. 31, 2014
Reconcilation of Share Amount Used in Computaion of Basic and Diluted Earnings Per Share	Basic EPS is computed by dividing net income attributable to Entegris, Inc. by the weighted average number of shares of common stock outstanding during each period. The following table presents a reconciliation of the share amounts used in the computation of basic and diluted earnings per share:


	(In thousands)	2014	2013	2012
	Basic earnings per share—Weighted common shares outstanding	139,311	138,950	137,306

	Weighted common shares assumed upon exercise of options and vesting of restricted stock units	751	668	1,106

	Diluted earnings per share—Weighted common shares outstanding	140,062	139,618	138,412

Shares Excluded Underlying Stock Based Awards from Calculations of Diluted EPS	excluded the following shares underlying stock-based awards from the calculations of diluted EPS because their inclusion would have been anti-dilutive for the years ended December 31, 2014, 2013 and 2012:


	(In thousands)	2014	2013	2012
	Shares excluded from calculations of diluted EPS	1,183	1,248	1,431

Segment_Information_Tables

Segment Information (Tables)	12 Months Ended
	Dec. 31, 2014
Summary of Financial Information for Reportable Segments

	(In thousands)	2014			2013			2012
	Net sales:
	CMH	$	653,964		$	609,826		$	630,929

	EM	308,105			83,633			84,974

	Total net sales	$	962,069		$	693,459		$	715,903

	(In thousands)	2014			2013			2012
	Segment profit:
	CMH	$	138,379		$	128,910		$	144,758

	EM	90,121			20,034			21,051

	Total segment profit	$	228,500		$	148,944		$	165,809

	(In thousands)	2014			2013			2012
	Total assets:
	CMH	$	500,575		$	395,291		$	362,672

	EM	804,889			46,831			41,348

	Corporate	456,627			433,172			407,524

	Total assets	$	1,762,091		$	875,294		$	811,544



	(In thousands)	2014			2013			2012
	Depreciation and amortization:
	CMH	$	37,455		$	32,797		$	31,612

	EM	41,671			4,238			4,358

	Corporate	4,578			1,780			1,637

	Total depreciation and amortization	$	83,704		$	38,815		$	37,607

	(In thousands)	2014			2013			2012
	Capital expenditures:
	CMH	$	33,619		$	49,893		$	40,683

	EM	19,450			6,842			5,579

	Corporate	4,664			3,625			3,667

	Total capital expenditures	$	57,733		$	60,360		$	49,929

Reconciliation of Total Segment Profit to Operating Income	The following table reconciles total segment profit to income before income taxes and equity in net loss (income) of affiliates:


	(In thousands)	2014			2013			2012
	Total segment profit	$	228,500		$	148,944		$	165,809

	Less:
	Charge for fair value write-up of acquired inventory sold	48,586			—			—

	Amortization of intangibles	37,067			9,347			9,594

	Contingent consideration fair value adjustment	(1,282		)	(1,813		)	—

	Unallocated general and administrative expenses	122,775			47,173			56,771

	Operating income	21,354			94,237			99,444

	Interest expense	33,355			153			271

	Interest income	(1,336		)	(317		)	(281		)
	Other expense (income), net	2,727			(1,794		)	(249		)

	(Loss) income before income tax (benefit) expense and equity in net loss (income) of affiliates	$	(13,392	)	$	96,195		$	99,703

Amortization of Intangibles	The table below sets forth the amortization expense for the years ended December 31, 2014, 2013, and 2012:


	(In thousands)	2014			2013			2012
	Amortization expense	$	37,067		$	9,347		$	9,594

	The following table presents amortization of intangibles for each of the Company’s segments for the years ended December 31, 2014, 2013 and 2012:


	(In thousands)	2014			2013			2012
	Amortization of intangibles:
	CMH	$	10,180		$	8,620		$	8,772

	EM	26,887			727			822

		$	37,067		$	9,347		$	9,594

Summary of Total Net Sales to External Customers	The following table summarizes total net sales, based upon the country to which sales to external customers were made for the years ended December 31, 2014, 2013 and 2012:


	(In thousands)	2014			2013			2012
	Net sales:
	United States	$	239,040		$	201,380		$	218,903

	Japan	121,452			101,529			131,521

	Germany	27,867			23,240			24,437

	Taiwan	230,824			128,194			126,732

	Singapore	46,051			30,942			25,607

	South Korea	122,328			76,353			70,763

	China	66,186			36,299			31,499

	Other	108,321			95,522			86,441

		$	962,069		$	693,459		$	715,903

Summary of Property, Plant and Equipment Attributed to Significant Countries	The following table summarizes property, plant and equipment, net, attributed to significant countries for the years ended December 31, 2014, 2013 and 2012:


	(In thousands)	2014			2013			2012
	Property, plant and equipment:
	United States	$	222,125		$	123,846		$	86,476

	Korea	32,163			4,422			4,946

	Japan	22,261			24,007			27,024

	Malaysia	20,607			23,801			28,398

	Other	16,413			10,364			10,177

		$	313,569		$	186,440		$	157,021

Quarterly_InformationUnaudited1

Quarterly Information-Unaudited (Tables)	12 Months Ended
	Dec. 31, 2014
Quartely Information

		Fiscal quarter ended
	(In thousands, except per share data)	March 29, 2014		June 28, 2014			September 27, 2014			December 31, 2014
	Net sales	$	165,804	$	251,578		$	273,054		$	271,633

	Gross profit	71,352		88,668			98,743			117,920

	Net income	14,312		(14,669		)	(1,068		)	9,312

	Basic income per share	0.1		(0.11		)	(0.01		)	0.07

	Diluted income per share	0.1		(0.11		)	(0.01		)	0.07



		Fiscal quarter ended
	(In thousands, except per share data)	March 30, 2013		June 29, 2013			September 28, 2013			December 31, 2013
	Net sales	$	165,070	$	177,544		$	164,585		$	186,260

	Gross profit	67,128		77,570			70,132			79,384

	Net income	16,397		19,781			17,807			20,541

	Basic income per share	0.12		0.14			0.13			0.15

	Diluted income per share	0.12		0.14			0.13			0.15

Summary_of_Significant_Account2

Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Apr. 30, 2014
Significant Accounting Policies [Line Items]
Long-term Debt, Fair Value	$764,000,000
Long-term Debt	$766,796,000		$820,000,000
Estimated useful life of amortizable intangible assets	8 years 6 months	9 years 4 months
Minimum
Significant Accounting Policies [Line Items]
Estimated useful life of amortizable intangible assets	3 years
Maximum
Significant Accounting Policies [Line Items]
Estimated useful life of amortizable intangible assets	15 years

Purchase_Price_Details

Purchase Price (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Apr. 01, 2013	Apr. 30, 2014
Acquisitions [Line Items]
Payments to Acquire Businesses, Net of Cash Acquired	$809,390	$13,358	$2,961
Contingent consideration obligation	0	1,282
Jetalon [Member]
Acquisitions [Line Items]
Payments to Acquire Businesses, Net of Cash Acquired		13,358
Contingent consideration obligation				3,094
Total purchase price, net of cash acquired				16,452
ATMI [Member]
Acquisitions [Line Items]
Cash paid to ATMI shareholders	1,099,033
Cash paid in settlement of share based compensation awards	31,451
Total purchase price	1,130,484
Less cash and cash equivalents acquired					321,094
Total purchase price, net of cash acquired					$809,390

Acquisitions_Purchase_Price_Al

Acquisitions Purchase Price Allocations (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Apr. 30, 2014	Apr. 01, 2013
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Apr. 30, 2014	Apr. 01, 2013
Acquisitions [Line Items]
Goodwill	$340,743	$12,274	$2,209
ATMI [Member]
Acquisitions [Line Items]
Accounts receivable and other current assets				107,967
Inventory				115,507
Property, Plant, and Equipment				126,302
Identifiable intangible assets				297,040
Other Noncurrent Assets				13,216
Current liabilities				-60,056
Deferred Tax Liabilities and other Noncurrent liabilities				-122,710
Net assets acquired				477,266
Goodwill				332,124
Total purchase price, net of cash acquired				809,390
Jetalon [Member]
Acquisitions [Line Items]
Accounts receivable, inventory and other assets					944
Identifiable intangible assets					5,634
Current liabilities					-216
Net assets acquired					6,362
Goodwill					10,090
Total purchase price, net of cash acquired					$16,452

Proforma_Results_Details

Proforma Results (Details) (ATMI [Member], USD $)	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
ATMI [Member]
Acquisitions [Line Items]
Business Acquisition, Pro Forma Revenue	$1,076,334	$1,051,175
Business Acquisition, Pro Forma Net Income (Loss)	$68,279	$60,324
Business Acquisition, Pro Forma Earnings Per Share, Basic	$0.49	$0.43
Business Acquisition, Pro Forma Earnings Per Share, Diluted	$0.49	$0.43

Acquisitions_Details

Acquisitions (Details) (USD $)	12 Months Ended			3 Months Ended
Acquisitions (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Jun. 30, 2012	Apr. 30, 2014	Apr. 01, 2013	Apr. 02, 2012	Apr. 01, 2014
Acquisitions [Line Items]
Charge for fair value write-up of acquired inventory sold	$48,586,000	$0	$0
Goodwill	340,743,000	12,274,000	2,209,000
Payments to Acquire Businesses, Net of Cash Acquired	809,390,000	13,358,000	2,961,000
Contingent consideration obligation	0	1,282,000
Contingent consideration fair value adjustment	-1,282,000	-1,813,000	0
Long-term Debt	766,796,000				820,000,000
ATMI [Member]
Acquisitions [Line Items]
Inventory					115,507,000
Identifiable intangible assets					297,040,000
Sale of Stock, Price Per Share					$34
Inventory fair value step-up					48,600,000
Charge for fair value write-up of acquired inventory sold	48,600,000
Property, Plant, and Equipment					126,302,000
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	8 years 3 months
Goodwill					332,124,000
Payments to Acquire Businesses, Gross	1,130,484,000
Direct costs associated with the transaction	13,300,000
Business Acquisition, Revenue Reported by Acquired Entity for Last Annual Period		361,000,000
Total purchase price, net of cash acquired					809,390,000
Pre-combination payment of unvested portion of awards	21,300,000
Jetalon [Member]
Acquisitions [Line Items]
Identifiable intangible assets						5,634,000
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		10 years
Goodwill						10,090,000
Payments to Acquire Businesses, Net of Cash Acquired		13,358,000
Contingent Consideration Arrangements, Range of Outcomes, Value, High						14,500,000
Contingent consideration obligation						3,094,000
Total purchase price, net of cash acquired						16,452,000
Contingent consideration fair value adjustment		-1,800,000
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Asset	-1,300,000
EPT [Member]
Acquisitions [Line Items]
Business Combination, Step Acquisition, Equity Interest in Acquiree, Remeasurement Gain				1,300,000
Foreign currency transaction gain realized upon acquisition.				200,000
Goodwill							2,200,000
Business Acquisition, Percentage of Voting Interests Acquired							50.00%
Business Combination, Step Acquisition, Equity Interest in Acquiree, Fair Value				2,900,000
Equity Method Investment, Ownership Percentage			50.00%
Business Combination, Consideration Transferred				3,400,000
Customer Relationships \| ATMI [Member]
Acquisitions [Line Items]
Finite-lived Intangible Assets Acquired	165,100,000
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	10 years
Trademarks and Trade names \| ATMI [Member]
Acquisitions [Line Items]
Finite-lived Intangible Assets Acquired	120,800,000
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	6 years
Other Intangible Assets \| ATMI [Member]
Acquisitions [Line Items]
Finite-lived Intangible Assets Acquired	11,100,000
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	7 years 5 months
Noncompete Agreements [Member]
Acquisitions [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	1 year 7 months
Noncompete Agreements [Member] \| ATMI [Member]
Acquisitions [Line Items]
Finite-lived Intangible Assets Acquired	7,500,000
Senior secured term loan [Member]
Acquisitions [Line Items]
Long-term Debt	406,796,000
Senior secured term loan [Member] \| ATMI [Member]
Acquisitions [Line Items]
Long-term Debt					460,000,000
Senior unsecured notes [Member]
Acquisitions [Line Items]
Long-term Debt	360,000,000
Senior unsecured notes [Member] \| ATMI [Member]
Acquisitions [Line Items]
Long-term Debt								$360,000,000

Trade_Accounts_and_Notes_Recei2

Trade Accounts and Notes Receivable (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable	$151,082	$94,613
Notes receivable	4,706	9,039
Trade accounts and notes receivable, gross	155,788	103,652
Less allowance for doubtful accounts	1,827	1,779
Trade accounts and notes receivable, net	$153,961	$101,873

Inventories_Detail

Inventories (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Inventory Net
Raw materials	$41,015	$26,012
Work-in-process	14,190	10,512
Finished goods	107,431	56,998
Supplies	489	552
Total inventories	$163,125	$94,074

Inventories_Additional_Detail

Inventories Additional (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Inventory Net [Abstract]
Consignment inventories held by customers	$11	$5.10

Property_Plant_and_Equipment_D

Property, Plant and Equipment (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Property, Plant and Equipment [Line Items]
Land	15,064	$12,866
Buildings and improvements	150,450	109,105
Manufacturing equipment	214,509	168,197
Canisters and cylinders	42,154	0
Molds	80,532	76,909
Office furniture and equipment	99,624	70,158
Construction in progress	27,185	33,021
Property, plant and equipment, gross	629,518	470,256
Less accumulated depreciation	315,949	283,816
Property, plant and equipment, net	313,569	$186,440	$157,021
Minimum \| Building and Building Improvements
Property, Plant and Equipment [Line Items]
Estimated useful lives in years	5 years
Minimum \| Manufacturing Equipment
Property, Plant and Equipment [Line Items]
Estimated useful lives in years	5 years
Minimum \| Canisters and cylinders
Property, Plant and Equipment [Line Items]
Estimated useful lives in years	3 years
Minimum \| Molds
Property, Plant and Equipment [Line Items]
Estimated useful lives in years	3 years
Minimum \| Office Furniture and Equipment
Property, Plant and Equipment [Line Items]
Estimated useful lives in years	3 years
Maximum \| Building and Building Improvements
Property, Plant and Equipment [Line Items]
Estimated useful lives in years	35 years
Maximum \| Manufacturing Equipment
Property, Plant and Equipment [Line Items]
Estimated useful lives in years	10 years
Maximum \| Canisters and cylinders
Property, Plant and Equipment [Line Items]
Estimated useful lives in years	12 years
Maximum \| Molds
Property, Plant and Equipment [Line Items]
Estimated useful lives in years	5 years
Maximum \| Office Furniture and Equipment
Property, Plant and Equipment [Line Items]
Estimated useful lives in years	8 years

Depreciation_Expense_Detail

Depreciation Expense (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Property, Plant and Equipment [Line Items]
Depreciation expense	$46,637	$29,468	$28,013

Intangible_Assets_Goodwill_Det

Intangible Assets Goodwill (Details) (USD $)	12 Months Ended
Intangible Assets Goodwill (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Goodwill [Line Items]
Goodwill	$340,743,000	$12,274,000	$2,209,000
Goodwill, Acquired During Period	332,124,000	10,090,000
Goodwill, Translation Adjustments	-3,655,000	-25,000
Goodwill, Period Increase (Decrease)	328,500,000
CMH
Goodwill [Line Items]
Goodwill	47,483,000	12,274,000	2,209,000
Goodwill, Acquired During Period	35,329,000	10,090,000
Goodwill, Translation Adjustments	-120,000	-25,000
EM
Goodwill [Line Items]
Goodwill	293,260,000	0	0
Goodwill, Acquired During Period	296,795,000	0
Goodwill, Translation Adjustments	($3,535,000)	$0

Intangible_Assets_Detail

Intangible Assets (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Finite-Lived Intangible Assets [Line Items]
Gross carrying Amount	$455,089	$152,977
Accumulated amortization	146,535	109,468
Net carrying value	308,554	43,509
Weighted average life in years	8 years 6 months	9 years 4 months
Patents
Finite-Lived Intangible Assets [Line Items]
Gross carrying Amount	1,347	1,369
Accumulated amortization	779	649
Net carrying value	568	720
Weighted average life in years	9 years 10 months	9 years 10 months
Developed Technology Rights
Finite-Lived Intangible Assets [Line Items]
Gross carrying Amount	199,402	78,686
Accumulated amortization	78,785	62,257
Net carrying value	120,617	16,429
Weighted average life in years	6 years 7 months	7 years 5 months
Trademarks and Trade names
Finite-Lived Intangible Assets [Line Items]
Gross carrying Amount	17,152	13,092
Accumulated amortization	8,883	7,306
Net carrying value	8,269	5,786
Weighted average life in years	9 years 10 months	12 years 0 months
Customer Relationships
Finite-Lived Intangible Assets [Line Items]
Gross carrying Amount	220,420	57,617
Accumulated amortization	54,452	39,146
Net carrying value	165,968	18,471
Weighted average life in years	10 years 4 months	11 years 0 months
Other Intangible Assets
Finite-Lived Intangible Assets [Line Items]
Gross carrying Amount	16,768	2,213
Accumulated amortization	3,636	110
Net carrying value	$13,132	$2,103
Weighted average life in years	6 years 7 months	13 years 4 months

Amortization_Expense_Detail

Amortization Expense (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Finite-Lived Intangible Assets [Line Items]
Amortization expense	$37,067	$9,347	$9,594

Estimated_Future_Amortization_

Estimated Future Amortization Expense (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Finite-Lived Intangible Assets [Line Items]
2014	$47,835
2015	45,401
2016	43,977
2017	42,725
2018	40,472
Thereafter	88,144
Intangible assets, net	$308,554	$43,509

Longterm_debt_schedule_Details

Long-term debt schedule (Details) (USD $)	Dec. 31, 2014	Apr. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified	Dec. 31, 2014	Apr. 30, 2014	Dec. 31, 2013
Debt Instrument [Line Items]
Long-term Debt	$766,796	$820,000
Long-term debt, current maturities	100,000		0
Long-term debt, excluding current maturities	666,796		0
Senior secured term loan [Member]
Debt Instrument [Line Items]
Long-term Debt	406,796
Senior unsecured notes [Member]
Debt Instrument [Line Items]
Long-term Debt	$360,000

Maturity_Schedule_Details

Maturity Schedule (Details) (USD $)	Dec. 31, 2014	Apr. 30, 2014
In Thousands, unless otherwise specified	Dec. 31, 2014	Apr. 30, 2014
Debt [Abstract]
2015	$26,597
2016	0
2017	0
2018	0
2019	0
Thereafter	740,199
Long-term Debt	$766,796	$820,000

Additional_Debt_Details

Additional Debt (Details) (USD $)	12 Months Ended
Additional Debt (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Apr. 30, 2014	Apr. 01, 2014
Debt Instrument [Line Items]
Long-term Debt	$766,796,000			$820,000,000
Long-term debt, current maturities	100,000,000	0
Debt discount	2,300,000
Debt Issuance Cost	20,700,000
Amortization of debt issuance costs	5,848,000	0	0
Debt Instrument, Fee Amount	3,951,000
Senior unsecured notes [Member]
Debt Instrument [Line Items]
Long-term Debt	360,000,000
Debt Instrument, Interest Rate, Stated Percentage					6.00%
Debt Instrument, Redemption Price, Percentage	100.00%
Minimum redemption price on or after April 1, 2017	100.00%
Maximum redemption price on or after April 1, 2017	104.50%
Redemption price, change of control	101.00%
Event of default percentage	25.00%
ABL Facility [Member]
Debt Instrument [Line Items]
Repayments of Debt	37,500,000
Maximum Borrowing Capacity				75,000,000
Current Borrowing Capacity	64,600,000
Additional borrowing capacity that may be increased by under ABL				35,000,000
Letters of credit maximum borrowing capacity				35,000,000
Swingline loans available				20,000,000
Line of Credit Facility, Commitment Fee Percentage	0.33%
Senior secured term loan [Member]
Debt Instrument [Line Items]
Long-term Debt	406,796,000
Increased borrowing capacity under certain conditions	225,000,000
Debt Instrument, Interest Rate, Stated Percentage	3.50%
Repayments of Debt	51,150,000
Obligated payments to be remitted in 2015	$26,597,000
Prepayment % of annual excess cash flow	50.00%
Prepayment % for asset sales and casualty events	100.00%

Future_Minimum_Lease_Payments_

Future Minimum Lease Payments (Detail) (USD $)	Dec. 31, 2014
In Thousands, unless otherwise specified	Dec. 31, 2014
Operating Leased Assets [Line Items]
2014	$10,708
2015	6,810
2016	4,596
2017	3,738
2018	948
Thereafter	292
Total minimum lease payments	$27,092

Lease_Commitments_Additional_I

Lease Commitments - Additional Information (Detail) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Operating Leased Assets [Line Items]
Total rental expense for all equipment and building operating leases	$13.30	$9.50	$9.40

Asset_Retirement_Obligations_D

Asset Retirement Obligations (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014
Asset Retirement Obligation [Abstract]
Asset Retirement Obligation Balanace at December 31, 2013	$2,167
Liabilities Assumed in ATMI acquisition	7,365
Liabilities Settled	-128
Liabilities Incurred	248
Accretion Expense	195
Revision of Estimate	103
Asset Retirement Obligation at December 31, 2014	$9,950

Loss_Income_Before_Income_Taxe

(Loss) Income Before Income Taxes (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Taxes [Line Items]
Domestic	($118,917)	$29,066	$49,056
Foreign	105,525	67,129	50,647
(Loss) income before income tax (benefit) expense and equity in net loss (income) of affiliates	($13,392)	$96,195	$99,703

Components_of_Income_Tax_Benef

Components of Income Tax (Benefit) Expense (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Components Of Income Tax Expense Benefit [Line Items]
Current, Federal	$1,574	$854	$5,797
Current, State	111	772	654
Current, Foreign	21,459	12,937	11,183
Current, Total	23,144	14,563	17,634
Deferred (net of valuation allowance), Federal	-41,484	6,003	11,165
Deferred (net of valuation allowance), State	-1,545	-650	168
Deferred (net of valuation allowance), Foreign	-1,687	1,753	1,914
Deferred (net of valuation allowance), Total	-44,716	7,106	13,247
Income tax (benefit) expense	($21,572)	$21,669	$30,881

Reconciliation_of_Income_Tax_E

Reconciliation of Income Tax Expense With Expected Amounts Based Upon Statutory Federal Tax Rates (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Investments, Owned, Federal Income Tax Note [Line Items]
Expected federal income tax at statutory rate	($4,687)	$33,668	$34,896
State income taxes before valuation allowance, net of federal tax effect	-2,115	-357	440
Income (losses) without tax expense (benefit)	-72	22	-40
Effect of foreign source income	-19,996	-10,583	-5,314
Tax contingencies	1,379	1,383	1,374
Valuation allowance	2,106	445	358
Nondeductible acquisition costs	2,176	0	0
U.S. federal research credit	-2,085	-3,233	-790
Other items, net	1,722	324	-43
Income tax (benefit) expense	($21,572)	$21,669	$30,881

Deferred_Tax_Assets_and_Deferr

Deferred Tax Assets and Deferred Tax Liabilities (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Schedule of Deferred Tax Assets and Liabilities [Line Items]
Accounts receivable	$243	$269
Inventory	5,663	2,853
Accruals not currently deductible for tax purposes	9,915	8,844
Net operating loss and credit carryforwards	12,183	3,972
Capital loss carryforward	3,088	2,779
Depreciation	10,498	1,070
Equity compensation	3,662	3,157
Asset impairments	732	732
Purchased intangibles assets	0	1,439
Other, net	5,549	2,976
Gross deferred tax assets	51,533	28,091
Valuation allowance	-11,104	-5,435
Total deferred tax assets	40,429	22,656
Depreciation	0	-3,245
Purchased intangible assets	-77,149	-601
Gross deferred tax liabilities	-77,149	-3,846
Total deferred tax liabilities	-36,720
Net deferred tax assets		$18,810

Reconciliations_of_Total_Amoun

Reconciliations of Total Amount of Gross Unrecognized Tax Benefits (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Schedule of Unrecognized Tax Benefits [Line Items]
Unrecognized Tax Benefits, Increase Resulting from Acquisition	$2,431	$0
Gross unrecognized tax benefits at beginning of year	4,277	5,419
Increases in tax positions for prior years	0	28
Decreases in tax positions for prior years	-246	0
Increases in tax positions for current year	2,409	1,879
Settlements	-1,385	-2,298
Lapse in statute of limitations	-1,502	-751
Gross unrecognized tax benefits at end of year	$5,984	$4,277

Income_Taxes_Additional_Inform

Income Taxes - Additional Information (Detail) (USD $)	12 Months Ended
Income Taxes - Additional Information (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2011	Dec. 31, 2012
Income Tax [Line Items]
Deferred Tax Liabilities, Net	($36,720,000)
Net deferred tax assets		-18,810,000
Deferred Tax Assets, Valuation Allowance	11,104,000	5,435,000
Undistributed foreign earnings	618,000,000
Withholding taxes to be incurred on distribution of retained earnings	12,000,000
Unrecognized tax benefits that would impact effective tax rate	4,300,000
Accrued interest and penalties related to unrecognized tax benefits	500,000	800,000
Interest and penalties recognized in the statement of operations	-400,000	-100,000	0
Gross unrecognized tax benefit decrease within next twelve months	200,000
Effective Income Tax Rate Reconciliation, Tax Credit, Foreign, Amount	2,600,000
Income to utilize credit carryforward	31,000,000
State
Income Tax [Line Items]
State operating loss carryforwards	42,400,000
Operating loss carryforwards, expiration date	31-Dec-15
Year Which Prior Year's Tax Returns Are No Longer Subject to Tax Examination	31-Dec-10
Foreign
Income Tax [Line Items]
Deferred Tax Liabilities, Net	-1,400,000
Net deferred tax assets		8,200,000
Deferred Tax Assets, Valuation Allowance	500,000
Operating loss carryforwards, expiration date	31-Dec-23
Foreign tax credit carryforwards	7,200,000
Tax credit carryforwards, expiration date	31-Dec-19
Foreign operating loss carryforwards	2,700,000
Year Which Prior Year's Tax Returns Are No Longer Subject to Tax Examination	31-Dec-08
U.S.
Income Tax [Line Items]
Deferred Tax Liabilities, Net	-24,800,000
Net deferred tax assets		16,000,000
Deferred Tax Assets, Valuation Allowance	10,600,000	5,400,000
Year Which Prior Year's Tax Returns Are No Longer Subject to Tax Examination	31-Dec-10
Malaysia
Income Tax [Line Items]
Income tax expense benefit per diluted share	$0.06	$0.04		$0.02
additional effective tax rate benefit	3,300,000
Income tax benefit estimate attributable to the tax status of subsidiary	8,000,000	5,400,000		2,400,000
Korea Tax Authority [Member]
Income Tax [Line Items]
Income tax expense benefit per diluted share	$0
additional effective tax rate benefit	200,000
Income tax benefit estimate attributable to the tax status of subsidiary	200,000
Inland Revenue, Singapore (IRAS) [Member]
Income Tax [Line Items]
Income tax expense benefit per diluted share	$0	$0.01		$0
additional effective tax rate benefit	3,700,000
Income tax benefit estimate attributable to the tax status of subsidiary	500,000	1,200,000		0
Research Tax Credit Carryforward [Member]
Income Tax [Line Items]
Tax Credit Carryforward, Amount	$3,600,000
Research Tax Credit Carryforward [Member] \| U.S.
Income Tax [Line Items]
Tax credit carryforwards, expiration date	31-Dec-33

Equity_Additional_Information_

Equity - Additional Information (Detail) (USD $)	12 Months Ended			0 Months Ended
Equity - Additional Information (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Feb. 08, 2014	Dec. 12, 2012
Equity [Line Items]
Payments for Repurchase of Common Stock	$0	$15,494,000	$427,000
Shares absorbed into plan	5,700,000
Term of plan, in years	10 years
Weighted average remaining contractual term option outstanding	4 years 7 months
Weighted average remaining contractual term option exercisable	3 years 1 month
Shares available for future grants	11,600,000	6,800,000	7,700,000
Total pre-tax intrinsic value of stock options exercised	3,300,000	1,800,000
Total pre-tax intrinsic value based on the closing stock price	$13.21
Intrinsic value of stock options outstanding	7,200,000
Intrinsic value of stock options exercisable	3,900,000
Percentage of employee contribution from compensation	10.00%
Weighted average remaining contractual term for unvested restricted shares, in years	2 years 4 months	2 years
Compensation cost expected to be recognized (in years)	2 years 7 months
Share-based payment awards in the form of stock option awards	651,000	553,000	470,000
Contractual term of stock options (in years)	7 years
Minimum
Equity [Line Items]
Vesting period, in years	3 years
Maximum
Equity [Line Items]
Vesting period, in years	4 years
Unvested Stock Options
Equity [Line Items]
Total compensation cost not yet recognized	3,700,000
Restricted Stock
Equity [Line Items]
Total compensation cost not yet recognized		11,800,000
BOD authorized plan
Equity [Line Items]
Authorized amount under share repurchase program					$50,000,000
Share repurchase plan commencement date					12-Dec-12
Share repurchase plan expiration date				7-Feb-14
Employee Stock Purchase Plan
Equity [Line Items]
Shares available for future grants	200,000
Common shares reserved for future issuance under the ESPP	4,000,000
Rate of discount from the fair market value	15.00%
Shares issued under the ESPP	3,800,000
Shares purchase by employees	200,000	200,000	300,000
Weighted-average price per share paid by the employees	$10.57	$8	$7.34
Shareholder Rights Plan
Equity [Line Items]
Shares entitled to be purchased of a series of preferred stock under each right	one-hundredth
Exercise price under the shareholder rights plan	$50
Redemption of rights	$0.01
Percentage of common shares outstanding	15.00%

Share_Based_Compensation_Expen

Share Based Compensation Expense Recognized in Statement of Operations (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense	$8,887	$7,928	$9,881

Summary_of_Option_Activity_Det

Summary of Option Activity (Detail) (USD $)	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Number of shares
Number of shares, Options outstanding, beginning of year	1,961	2,565	3,561
Number of shares, Granted	651	553	470
Number of shares, Exercised	-546	-786	-1,293
Number of shares, Expired or Forfeited	-32	-371	-173
Number of shares, Options outstanding, end of year	2,034	1,961	2,565
Number of shares, Options exercisable, end of year	728	1,001	1,828
Weighted average exercise price
Weighted average exercise price, Options outstanding, beginning of year	$8.20	$8.20	$6.53
Weighted average exercise price, Granted	$11.71	$9.88	$9.27
Weighted average exercise price, Exercised	$6.56	$7.54	$3.76
Weighted average exercise price, Expired or Forfeited	$14.06	$12.10	$9.83
Weighted average exercise price, Options outstanding, end of year	$9.67	$8.20	$8.20
Weighted average exercise price, Options exercisable, end of year	$7.92	$6.92	$8.18

Summary_of_Options_Outstanding

Summary of Options Outstanding (Detail) (USD $)	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2014
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Number of Options outstanding	2,034
Options outstanding, Weighted average remaining life in years	4 years 7 months
Options outstanding, Weighted-average exercise price	$9.67
Number of Options exercisable	728
Options exercisable, Weighted average exercise price	$7.92
Range One
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of exercise prices, minimum	$0
Range of exercise prices, maximum	$9.40
Number of Options outstanding	842
Options outstanding, Weighted average remaining life in years	3 years 0 months
Options outstanding, Weighted-average exercise price	$7.96
Number of Options exercisable	602
Options exercisable, Weighted average exercise price	$7.50
Range Two
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of exercise prices, minimum	$9.88
Range of exercise prices, maximum	$9.88
Number of Options outstanding	541
Options outstanding, Weighted average remaining life in years	5 years 1 month
Options outstanding, Weighted-average exercise price	$9.88
Number of Options exercisable	126
Options exercisable, Weighted average exercise price	$9.88
Range Three
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of exercise prices, minimum	$11.71
Range of exercise prices, maximum	$11.71
Number of Options outstanding	651
Options outstanding, Weighted average remaining life in years	6 years 1 month
Options outstanding, Weighted-average exercise price	$11.71
Number of Options exercisable	0
Options exercisable, Weighted average exercise price	$0

Cash_Received_from_Exercise_of

Cash Received from Exercise of Stock Options and Employee Contribution to ESPP (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercise of stock options and employee contributions to the ESPP	$3,117	$7,685	$7,431

Summary_of_Restricted_Stock_Ac

Summary of Restricted Stock Activity (Detail) (USD $)	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Number of shares
Number of shares, Unvested, beginning of year	1,570	1,802	2,298
Number of shares, Granted	834	717	744
Number of shares, Vested	-686	-871	-1,132
Number of shares, Forfeited	-105	-78	-108
Number of shares, Unvested, end of year	1,613	1,570	1,802
Weighted average grant date fair value, Unvested
Weighted average grant date fair value, Unvested, beginning of year	$8.98	$7.02	$5.49
Weighted average grant date fair value, Granted	$11.59	$9.85	$9.21
Weighted average grant date fair value, Vested	$8.32	$5.67	$5.42
Weighted average grant date fair value, Forfeited	$10.14	$8.66	$6.22
Weighted average grant date fair value, Unvested, end of year	$10.53	$8.98	$7.02

Summary_of_Allocation_of_Share

Summary of Allocation of Share Based Compensation Expense (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense	$8,887	$7,928	$9,881
Tax benefit	2,746	2,643	3,686
Share-based compensation expense, net of tax	6,141	5,285	6,195
Cost of Sales
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense	809	690	575
Engineering, Research and Development Expense
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense	705	502	500
Selling, General And Administrative Expenses
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense	$7,373	$6,736	$8,806

Weighted_Average_Assumptions_U

Weighted Average Assumptions Used in Valuation and Resulting Weighted Average Fair Value Per Option Granted (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Volatility	43.30%	51.70%	82.40%
Risk-free interest rate	1.10%	0.70%	0.60%
Dividend yield	0.00%	0.00%	0.00%
Expected life	3 years 9 months	3 years 7 months	3 years 9 months
Weighted average fair value per option	$3.99	$3.80	$5.42

Benefit_Plans_Additional_Infor

Benefit Plans - Additional Information (Detail) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2011
Defined Benefit Plan Disclosure [Line Items]
Maximum matching contribution	4.00%
Employer profit sharing and matching contribution expense	$4.40	$3.20	$3

Estimated_Funded_Status_Detail

Estimated Funded Status (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Defined Benefit Plan Disclosure [Line Items]
Benefit obligation at beginning of year	$9,855	$12,607
Service cost	64	98	89
Interest cost	111	122	163
Actuarial losses (gain)	336	-158
Benefits paid	-922	-1,072
Foreign exchange impact	-962	-1,742
Benefit obligation at end of year	8,482	9,855	12,607
Fair value of plan assets at beginning of year	384	382
Return on plan assets	9	5
Employer contributions	9	9
Foreign exchange impact	-22	-12
Fair value of plan assets at end of year	380	384	382
Plan assets less than benefit obligation - Net amount recognized	($8,102)	($9,471)

Amounts_Recognized_in_Consolid

Amounts Recognized in Consolidated Balance Sheet (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Defined Benefit Plan Disclosure [Line Items]
Noncurrent liability	($8,102)	($9,471)
Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net of Tax	$1,007	$857

Amounts_Recognized_in_Accumula

Amounts Recognized in Accumulated Other Comprehensive Loss Net of Tax (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss	$1,043	$811
Prior service cost	227	259
Unrecognized transition obligation	-9	-11
Gross amount recognized	1,261	1,059
Deferred income taxes	-254	-202
Net amount recognized	$1,007	$857

Pension_Plans_Accumulated_Bene

Pension Plans Accumulated Benefit Obligation in Excess of Plan Assets (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation	$8,482	$9,855
Accumulated benefit obligation	7,180	8,651
Fair value of plan assets	$380	$384

Components_of_Net_Periodic_Ben

Components of Net Periodic Benefit Cost (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Defined Benefit Plan Disclosure [Line Items]
Service cost	$64	$98	$89
Interest cost	111	122	163
Expected return on plan assets	-8	-7	-7
Amortization of prior service cost	18	19	19
Amortization of net transition obligation	-1	-1	-1
Amortization of plan loss	22	219	20
Recognized actuarial net loss	7	8	1
Acquisition	0	0	0
Curtailments	0	0	0
Net periodic pension benefit cost	$213	$458	$284

Estimated_Amount_Amortized_fro

Estimated Amount Amortized from Accumulated Other Comprehensive Income Into Net Periodic Benefit Cost (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014
Defined Benefit Plan Disclosure [Line Items]
Transition obligation	($1)
Prior service cost	17
Net actuarial loss	44
Pension and Other Postretirement Benefit Plans, Amounts that Will be Amortized from Accumulated Other Comprehensive Income (Loss) in Next Fiscal Year, Total	$60

Assumptions_Used_in_Determinin

Assumptions Used in Determining Benefit Obligation and Net Periodic Benefit Cost for Pension Plans (Detail)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Defined Benefit Plan Disclosure [Line Items]
Benefit obligations, Discount rate	1.13%	1.23%	1.19%
Benefit obligations, Rate of compensation increase	4.41%	4.10%	4.18%
Net periodic benefit cost, Discount rate	1.83%	1.41%	1.80%
Net periodic benefit cost, Rate of compensation increase	3.38%	2.01%	2.84%
Net periodic benefit cost, Expected return on plan assets	1.35%	0.70%	1.14%

Fair_Value_Measurements_of_Pen

Fair Value Measurements of Pension Plan Assets (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$380	$384	$382
Fair Value, Inputs, Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$380	$384

Expected_Contribution_and_Bene

Expected Contribution and Benefit Payments (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014
Defined Benefit Plan Disclosure [Line Items]
Contribution in year 2014	$9
Payments in year 2014	195
Payments in year 2015	129
Payments in year 2016	239
Payments in year 2017	264
Payments in year 2018	216
Payments in years 2019-2023	$2,297

Financial_Assets_Measured_at_F

Financial Assets Measured at Fair Value on Recurring Basis (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Short-term investments Commercial paper	$4,601	$0
Total assets measured and recorded at fair value	4,601	168,078
Foreign exchange forward contracts	1,851	514
Contingent consideration obligation	0	1,282
Total liabilities measured and recorded at fair value	1,851	1,796
Commercial Paper
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Cash equivalents	0	49,988
Money Market Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Cash equivalents	0	118,090
Fair Value, Inputs, Level 1
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Short-term investments Commercial paper	4,601	0
Total assets measured and recorded at fair value	4,601	118,090
Foreign exchange forward contracts	0	0
Contingent consideration obligation	0	0
Total liabilities measured and recorded at fair value	0	0
Fair Value, Inputs, Level 1 \| Commercial Paper
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Cash equivalents	0	0
Fair Value, Inputs, Level 1 \| Money Market Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Cash equivalents	0	118,090
Fair Value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Short-term investments Commercial paper	0	0
Total assets measured and recorded at fair value	0	49,988
Foreign exchange forward contracts	1,851	514
Contingent consideration obligation	0	0
Total liabilities measured and recorded at fair value	1,851	514
Fair Value, Inputs, Level 2 \| Commercial Paper
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Cash equivalents	0	49,988
Fair Value, Inputs, Level 2 \| Money Market Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Cash equivalents	0	0
Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Short-term investments Commercial paper	0	0
Total assets measured and recorded at fair value	0	0
Foreign exchange forward contracts	0	0
Contingent consideration obligation	0	1,282
Total liabilities measured and recorded at fair value	0	1,282
Fair Value, Inputs, Level 3 [Member] \| Commercial Paper
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Cash equivalents	0	0
Fair Value, Inputs, Level 3 [Member] \| Money Market Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Cash equivalents	$0	$0

Fair_Value_Measurements_Inform

Fair Value Measurements Information about derivative positions (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Derivative Liability	$4,336	$620
Gross Derivative Asset	2,485	106
Foreign exchange forward contracts	$1,851	$514

Fair_Value_Measurements_Losses

Fair Value Measurements (Losses) gains on forward currency contracts (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Losses on foreign exchange forward contracts	$1,456	$5,726

Fair_Value_Measurements_Additi

Fair Value Measurements - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Nov. 11, 2014
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gain on the sale of an equity method investment	$300,000
Gain on cumulative translation reclassification adjustment associated with the equity method investee	0	-787,000	0
Cash, fair value received	2,600,000
Equity Method Investments				2,300,000
Other than Temporary Impairment Losses, Investments	1,900,000
Available-for-sale Securities, Equity Securities	$4,600,000

Reconciliation_of_Share_Amount

Reconciliation of Share Amount Used in Computation of Basic and Diluted Earnings Per Share (Detail)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Schedule of Earnings Per Share, Basic and Diluted, by Common Class [Line Items]
Basic earnings (loss) per share-Weighted common shares outstanding	139,311	138,950	137,306
Weighted common shares assumed upon exercise of options and vesting of restricted stock units	751	668	1,106
Diluted earnings (loss) per share-Weighted common shares outstanding	140,062	139,618	138,412

Shares_Excluded_Underlying_Sto

Shares Excluded Underlying Stock Based Awards from Calculations of Diluted EPS (Detail)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Shares excluded from calculations of diluted EPS	1,183	1,248	1,431

Summary_of_Financial_Informati

Summary of Financial Information for Reportable Segments (Detail) (USD $)	3 Months Ended								12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Sep. 27, 2014	Jun. 28, 2014	Mar. 29, 2014	Dec. 31, 2013	Sep. 28, 2013	Jun. 29, 2013	Mar. 30, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Segment Reporting Information [Line Items]
Total net sales	$271,633	$273,054	$251,578	$165,804	$186,260	$164,585	$177,544	$165,070	$962,069	$693,459	$715,903
Total segment profit									228,500	148,944	165,809
Total assets	1,762,091				875,294				1,762,091	875,294	811,544
Total depreciation and amortization									83,704	38,815	37,607
Total capital expenditures									57,733	60,360	49,929
CMH
Segment Reporting Information [Line Items]
Total net sales									653,964	609,826	630,929
Total segment profit									138,379	128,910	144,758
Total assets	500,575				395,291				500,575	395,291	362,672
Total depreciation and amortization									37,455	32,797	31,612
Total capital expenditures									33,619	49,893	40,683
EM
Segment Reporting Information [Line Items]
Total net sales									308,105	83,633	84,974
Total segment profit									90,121	20,034	21,051
Total assets	804,889				46,831				804,889	46,831	41,348
Total depreciation and amortization									41,671	4,238	4,358
Total capital expenditures									19,450	6,842	5,579
Corporate
Segment Reporting Information [Line Items]
Total assets	456,627				433,172				456,627	433,172	407,524
Total depreciation and amortization									4,578	1,780	1,637
Total capital expenditures									$4,664	$3,625	$3,667

Reconciliation_of_Total_Segmen

Reconciliation of Total Segment Profit to Operating Income (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total segment profit	$228,500	$148,944	$165,809
Charge for fair value write-up of acquired inventory sold	48,586	0	0
Amortization of intangibles	37,067	9,347	9,594
Contingent consideration fair value adjustment	-1,282	-1,813	0
Unallocated general and administrative expenses	122,775	47,173	56,771
Operating income	21,354	94,237	99,444
Other expense (income), net	2,727	-1,794	-249
(Loss) income before income tax (benefit) expense and equity in net loss (income) of affiliates	-13,392	96,195	99,703
Interest expense	33,355	153	271
Interest income	$1,336	$317	$281

Amortization_of_Intangibles_De

Amortization of Intangibles (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Segment Reporting Information [Line Items]
Amortization of intangibles	$37,067	$9,347	$9,594
CMH
Segment Reporting Information [Line Items]
Amortization of intangibles	10,180	8,620	8,772
EM
Segment Reporting Information [Line Items]
Amortization of intangibles	$26,887	$727	$822

Summary_of_Total_Net_Sales_to_

Summary of Total Net Sales to External Customers (Detail) (USD $)	3 Months Ended								12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Sep. 27, 2014	Jun. 28, 2014	Mar. 29, 2014	Dec. 31, 2013	Sep. 28, 2013	Jun. 29, 2013	Mar. 30, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Segment Reporting Information [Line Items]
Net sales	$271,633	$273,054	$251,578	$165,804	$186,260	$164,585	$177,544	$165,070	$962,069	$693,459	$715,903
UNITED STATES
Segment Reporting Information [Line Items]
Net sales									239,040	201,380	218,903
JAPAN
Segment Reporting Information [Line Items]
Net sales									121,452	101,529	131,521
GERMANY
Segment Reporting Information [Line Items]
Net sales									27,867	23,240	24,437
TAIWAN, PROVINCE OF CHINA
Segment Reporting Information [Line Items]
Net sales									230,824	128,194	126,732
SINGAPORE
Segment Reporting Information [Line Items]
Net sales									46,051	30,942	25,607
KOREA, REPUBLIC OF
Segment Reporting Information [Line Items]
Net sales									122,328	76,353	70,763
CHINA
Segment Reporting Information [Line Items]
Net sales									66,186	36,299	31,499
All Other Segments
Segment Reporting Information [Line Items]
Net sales									$108,321	$95,522	$86,441

Summary_of_Property_Plant_and_

Summary of Property, Plant and Equipment Attributed to Significant Countries (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Segment Reporting Information [Line Items]
Property, plant and equipment	$313,569	$186,440	$157,021
UNITED STATES
Segment Reporting Information [Line Items]
Property, plant and equipment	222,125	123,846	86,476
KOREA, REPUBLIC OF
Segment Reporting Information [Line Items]
Property, plant and equipment	32,163	4,422	4,946
JAPAN
Segment Reporting Information [Line Items]
Property, plant and equipment	22,261	24,007	27,024
Malaysia
Segment Reporting Information [Line Items]
Property, plant and equipment	20,607	23,801	28,398
All Other Segments
Segment Reporting Information [Line Items]
Property, plant and equipment	$16,413	$10,364	$10,177

Segment_Information_Additional

Segment Information Additional Segment Detail (Details)	12 Months Ended
Segment Information Additional Segment Detail (Details)	Dec. 31, 2014
Segment Reporting [Abstract]
Concentration Risk, Percentage	13.60%

Quarterly_Information_Detail

Quarterly Information (Detail) (USD $)	3 Months Ended								12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2014	Sep. 27, 2014	Jun. 28, 2014	Mar. 29, 2014	Dec. 31, 2013	Sep. 28, 2013	Jun. 29, 2013	Mar. 30, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Schedule Of Quarterly Financial Information [Line Items]
Net sales	$271,633	$273,054	$251,578	$165,804	$186,260	$164,585	$177,544	$165,070	$962,069	$693,459	$715,903
Gross profit	117,920	98,743	88,668	71,352	79,384	70,132	77,570	67,128	376,683	294,214	307,383
Net income	$9,312	($1,068)	($14,669)	$14,312	$20,541	$17,807	$19,781	$16,397	$7,887	$74,526	$68,825
Basic income per share attributable to Entegris, Inc.	$0.07	($0.01)	($0.11)	$0.10	$0.15	$0.13	$0.14	$0.12	$0.06	$0.54	$0.50
Diluted income per share attributable to Entegris, Inc.	$0.07	($0.01)	($0.11)	$0.10	$0.15	$0.13	$0.14	$0.12	$0.06	$0.53	$0.50